Communication method, user equipment and base station

Abstract

Embodiments of the present application provide a communication method, a user equipment and a base station. The method executed by a user equipment comprises steps of: receiving a first signaling, the first signaling comprising information related to at least two activated BWPs, the at least two activated BWPs being located on different carriers, respectively, and the carriers where the at least two activated BWPs are located are configured in a same serving cell; and, performing uplink transmission or downlink reception on the at least two activated BWPS. In the embodiments of the present application, the UE can use at least two activated BWPs in a serving cell for transmission. Compared with aggregating activated BWPs in a plurality of serving cells for transmission, it is more flexible, the system can be better simplified, and the signaling overhead can be saved.

Description

COMMUNICATION METHOD, USER EQUIPMENT AND BASE STATION

[0001] The present application relates to the technical field of wireless communication, and in particular to a communication method, a user equipment (UE) and a base station.

[0002]

[0003] To meet the demand for wireless data traffic having increased since deployment of 4G communication systems, efforts have been made to develop an improved 5G or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a Beyond 4G Network or a Post LTE System. The 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60 GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, the beamforming, massive multiple-input multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed in 5G communication systems. In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud radio access networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation and the like. In the 5G system, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as an advanced access technology have been developed.

[0004] The Internet, which is a human centered connectivity network where humans generate and consume information, is now evolving to the Internet of Things (IoT) where distributed entities, such as things, exchange and process information without human intervention. The Internet of Everything (IoE), which is a combination of the IoT technology and the Big Data processing technology through connection with a cloud server, has emerged. As technology elements, such as sensing technology, wired / wireless communication and network infrastructure, service interface technology, and security technology, have been demanded for IoT implementation, a sensor network, a machine-to-machine (M2M) communication, machine type communication (MTC), and so forth have been recently researched. Such an IoT environment may provide intelligent Internet technology services that create a new value to human life by collecting and analyzing data generated among connected things. IoT may be applied to a variety of fields including smart home, smart building, smart city, smart car or connected cars, smart grid, health care, smart appliances and advanced medical services through convergence and combination between existing information technology (IT) and various industrial applications.

[0005] In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as a sensor network, machine to machine (M2M) communication, and machine type communication (MTC) may be implemented by beamforming, MIMO, and array antennas. Application of a cloud radio access network (RAN) as the above-described Big Data processing technology may also be considered to be as an example of convergence between the 5G technology and the IoT technology.

[0006] In addition, in 5G communication systems, developments of system network improvement are underway based on advanced small cell, cloud radio access network (RAN), ultra-dense network, device-to-device (D2D) communication, wireless backhaul, mobile network, cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation, etc.

[0007] In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as advanced coding modulation (ACM), and filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies have been developed.

[0008]

[0009] A plurality of carriers can be deployed by carrier aggregation (CA) or dual-connectivity (DC) in the existing communication system. In CA / DC, each serving cell can be activated by only one BWP, and the UE realizes simultaneous transmission by aggregating the activated BWP in a plurality of serving cells. However, in this aggregated transmission mode, each cell requires the respective signaling overhead, so that the system is more complicated.

[0010]

[0011] The embodiments of the present application aim to improve the flexibility of aggregated transmission so as to simplify the system and save the signaling overhead.

[0012] In accordance with one aspect of the embodiments of the present application, a method performed by a terminal in a wireless communication system, the method comprising: receiving, from a base station, configuration information on a plurality of carriers for a serving cell of the base station, the configuration information including information on at least one bandwidth part (BWP) configured for a carrier among the plurality of the carriers; receiving, from the base station, control information indicating a BWP activation of at least two BWPs, wherein the at least two BWPs are activated on different carriers of the serving cell based on the control information; and performing an uplink transmission or a downlink reception with the base station on the at least two BWPs.

[0013] In accordance with yet another aspect of the embodiments of the present application, another method performed by a base station in a wireless communication system, the method comprising: transmitting, to a terminal, configuration information on a plurality of carriers for a serving cell of the base station, the configuration information including information on at least one bandwidth part (BWP) configured for a carrier among the plurality of the carriers; transmitting, to the terminal, control information indicating a BWP activation of at least two BWPs, wherein the at least two BWPs are activated on different carriers of the serving cell based on the control information; and performing an uplink reception or a downlink transmission with the terminal on the at least two BWPs.

[0014] In accordance with yet another aspect of the embodiments of the present application, a terminal in a wireless communication system, the terminal comprising: a transceiver; and a processor coupled with the transceiver and configured to: receive, from a base station, configuration information on a plurality of carriers for a serving cell of the base station, the configuration information including information on at least one bandwidth part (BWP) configured for a carrier among the plurality of the carriers, receive, from the base station, control information indicating a BWP activation of at least two BWPs, wherein the at least two BWPs are activated on different carriers of the serving cell based on the control information, and perform an uplink transmission or a downlink reception with the base station on the at least two BWPs.

[0015] In accordance with yet another aspect of the embodiments of the present application, a base station in a wireless communication system, the base station comprising: a transceiver; and a processor coupled with the transceiver and configured to: transmit, to a terminal, configuration information on a plurality of carriers for a serving cell of the base station, the configuration information including information on at least one bandwidth part (BWP) configured for a carrier among the plurality of the carriers, transmit, to the terminal, control information indicating a BWP activation of at least two BWPs, wherein the at least two BWPs are activated on different carriers of the serving cell based on the control information, and perform an uplink reception or a downlink transmission with the terminal on the at least two BWPs.

[0016]

[0017] According to an example of the present disclosure, by aggregating activated BWPs in a single cell, the UE can perform simultaneous transmission on the plurality of carriers in a single cell.

[0018] Additionally, according to an example of the present disclosure, UE can obtain a more bandwidth gain compared with aggregating activated BWPs in a plurality of serving cells for transmission,

[0019] Moreover, according to an example of the present disclosure, by the base station that activating BWP and switching the activated BWP dynamically, the communication system can be better simplified, flexible, and the signaling overhead can be saved.

[0020]

[0021] In order to explain the technical schemes in the embodiments of the present application more clearly, the drawings to be used in the description of the embodiments of the present application will be briefly illustrated below.

[0022] Figure 1 is a schematic diagram of an overall structure of a wireless network according to an embodiment of the present application;

[0023] Figure 2a is a schematic diagram of a transmission path according to an embodiment of the present application;

[0024] Figure 2b is a schematic diagram of a reception path according to an embodiment of the present application;

[0025] Figure 3a is a schematic structure diagram of a UE according to an embodiment of the present application;

[0026] Figure 3b is a schematic structure diagram of a base station according to an embodiment of the present application;

[0027] Figure 4 is a flowchart of a method executed by a UE according to an embodiment of the present application;

[0028] Figure 5 is a flowchart of another method executed by a UE according to an embodiment of the present application;

[0029] Figure 6 is a flowchart of a method executed by a base station according to an embodiment of the present application; and

[0030] Figure 7 is a flowchart of another method executed by a base station according to an embodiment of the present application; and

[0031] Figure 8 is a schematic structure diagram of an electronic device according to an embodiment of the present application.

[0032]

[0033] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the present disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

[0034] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purpose only and not for the purpose of limiting the present disclosure as defined by the appended claims and their equivalents.

[0035] It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0036] The term "include" or "may include" refers to the existence of a corresponding disclosed function, operation or component which can be used in various embodiments of the present disclosure and does not limit one or more additional functions, operations, or components. The terms such as "include" and / or "have" may be construed to denote a certain characteristic, number, step, operation, constituent element, component or a combination thereof, but may not be construed to exclude the existence of or a possibility of addition of one or more other characteristics, numbers, steps, operations, constituent elements, components or combinations thereof.

[0037] The term "or" used in various embodiments of the present disclosure includes any or all of combinations of listed words. For example, the expression "A or B" may include A, may include B, or may include both A and B.

[0038] Unless defined differently, all terms used herein, which include technical terminologies or scientific terminologies, have the same meaning as that understood by a person skilled in the art to which the present disclosure belongs. Such terms as those defined in a generally used dictionary are to be interpreted to have the meanings equal to the contextual meanings in the relevant field of art, and are not to be interpreted to have ideal or excessively formal meanings unless clearly defined in the present disclosure.

[0039]

[0040] Figure 1 illustrates an example wireless network 100 according to various embodiments of the present disclosure.

[0041] The embodiment of the wireless network 100 shown in Figure 1 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0042] The wireless network 100 includes a gNodeB (gNB) 101, a gNB 102, and a gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one Internet Protocol (IP) network 130, such as the Internet, a private IP network, or other data networks.

[0043] Depending on a type of the network, other well-known terms such as "base station" or "access point" can be used instead of "gNodeB" or "gNB". For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access for remote terminals. And, depending on the type of the network, other well-known terms such as "mobile station", "user station", "remote terminal", "wireless terminal" or "user apparatus" can be used instead of "user equipment" or "UE". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to remote wireless devices that wirelessly access the gNB, no matter whether the UE is a mobile device (such as a mobile phone or a smart phone) or a fixed device (such as a desktop computer or a vending machine).

[0044] gNB 102 provides wireless broadband access to the network 130 for a first plurality of User Equipments (UEs) within a coverage area 120 of gNB 102. The first plurality of UEs include a UE 111, which may be located in a Small Business (SB); a UE 112, which may be located in an enterprise (E); a UE 113, which may be located in a WiFi Hotspot (HS); a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); a UE 116, which may be a mobile device (M), such as a cellular phone, a wireless laptop computer, a wireless PDA, etc. GNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within a coverage area 125 of gNB 103. The second plurality of UEs include a UE 115 and a UE 116. In some embodiments, one or more of gNBs 101-103 can communicate with each other and with UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX or other advanced wireless communication technologies.

[0045] The dashed lines show approximate ranges of the coverage areas 120 and 125, and the ranges are shown as approximate circles merely for illustration and explanation purposes. It should be clearly understood that the coverage areas associated with the gNBs, such as the coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on configurations of the gNBs and changes in the radio environment associated with natural obstacles and man-made obstacles.

[0046] As will be described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 include a 2D antenna array as described in embodiments of the present disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook designs and structures for systems with 2D antenna arrays.

[0047] Although Figure 1 illustrates an example of the wireless network 100, various changes can be made to Figure 1. The wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement, for example. Furthermore, gNB 101 can directly communicate with any number of UEs and provide wireless broadband access to the network 130 for those UEs. Similarly, each gNB 102-103 can directly communicate with the network 130 and provide direct wireless broadband access to the network 130 for the UEs. In addition, gNB 101, 102 and / or 103 can provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0048]

[0049] Figures 2a and 2b illustrate example wireless transmission and reception paths according to the present disclosure.

[0050] In the following description, the transmission path 200 can be described as being implemented in a gNB, such as gNB 102, and the reception path 250 can be described as being implemented in a UE, such as UE 116. However, it should be understood that the reception path 250 can be implemented in a gNB and the transmission path 200 can be implemented in a UE. In some embodiments, the reception path 250 is configured to support codebook designs and structures for systems with 2D antenna arrays as described in embodiments of the present disclosure.

[0051] The transmission path 200 includes a channel coding and modulation block 205, a Serial-to-Parallel (S-to-P) block 210, a size N Inverse Fast Fourier Transform (IFFT) block 215, a Parallel-to-Serial (P-to-S) block 220, a cyclic prefix addition block 225, and an up-converter (UC) 230. The reception path 250 includes a down-converter (DC) 255, a cyclic prefix removal block 260, a Serial-to-Parallel (S-to-P) block 265, a size N Fast Fourier Transform (FFT) block 270, a Parallel-to-Serial (P-to-S) block 275, and a channel decoding and demodulation block 280.

[0052] In the transmission path 200, the channel coding and modulation block 205 receives a set of information bits, applies coding (such as Low Density Parity Check (LDPC) coding), and modulates the input bits (such as using Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM)) to generate a sequence of frequency-domain modulated symbols. The Serial-to-Parallel (S-to-P) block 210 converts (such as demultiplexes) serial modulated symbols into parallel data to generate N parallel symbol streams, where N is a size of the IFFT / FFT used in gNB 102 and UE 116. The size N IFFT block 215 performs IFFT operations on the N parallel symbol streams to generate a time-domain output signal. The Parallel-to-Serial block 220 converts (such as multiplexes) parallel time-domain output symbols from the Size N IFFT block 215 to generate a serial time-domain signal. The cyclic prefix addition block 225 inserts a cyclic prefix into the time-domain signal. The up-converter 230 modulates (such as up-converts) the output of the cyclic prefix addition block 225 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at a baseband before switching to the RF frequency.

[0053] The RF signal transmitted from gNB 102 arrives at UE 116 after passing through the wireless channel, and operations in reverse to those at gNB 102 are performed at UE 116. The down-converter 255 down-converts the received signal to a baseband frequency, and the cyclic prefix removal block 260 removes the cyclic prefix to generate a serial time-domain baseband signal. The Serial-to-Parallel block 265 converts the time-domain baseband signal into a parallel time-domain signal. The Size N FFT block 270 performs an FFT algorithm to generate N parallel frequency-domain signals. The Parallel-to-Serial block 275 converts the parallel frequency-domain signal into a sequence of modulated data symbols. The channel decoding and demodulation block 280 demodulates and decodes the modulated symbols to recover the original input data stream.

[0054] Each of gNBs 101-103 may implement a transmission path 200 similar to that for transmitting to UEs 111-116 in the downlink, and may implement a reception path 250 similar to that for receiving from UEs 111-116 in the uplink. Similarly, each of UEs 111-116 may implement a transmission path 200 for transmitting to gNBs 101-103 in the uplink, and may implement a reception path 250 for receiving from gNBs 101-103 in the downlink.

[0055] Each of the components in Figures 2a and 2b can be implemented using only hardware, or using a combination of hardware and software / firmware. As a specific example, at least some of the components in Figures 2a and 2b may be implemented in software, while other components may be implemented in configurable hardware or a combination of software and configurable hardware. For example, the FFT block 270 and IFFT block 215 may be implemented as configurable software algorithms, in which the value of the size N may be modified according to the implementation.

[0056] Furthermore, although described as using FFT and IFFT, this is only illustrative and should not be interpreted as limiting the scope of the present disclosure. Other types of transforms can be used, such as Discrete Fourier transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer which is a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0057] Although Figures 2a and 2b illustrate examples of wireless transmission and reception paths, various changes may be made to Figures 2a and 2b. For example, various components in Figures 2a and 2b can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. Furthermore, Figures 2a and 2b are intended to illustrate examples of types of transmission and reception paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0058]

[0059] Figure 3a illustrates an example UE 116 according to the present disclosure.

[0060] The embodiment of UE 116 shown in Figure 3a is for illustration only, and UEs 111-115 of Figure 1 can have the same or similar configuration. However, a UE has various configurations, and Figure 3a does not limit the scope of the present disclosure to any specific implementation of the UE.

[0061] UE 116 includes an antenna 305, a radio frequency (RF) transceiver 310, a transmission (TX) processing circuit 315, a microphone 320, and a reception (RX) processing circuit 325. UE 116 also includes a speaker 330, a processor / controller 340, an input / output (I / O) interface 345, an input device(s) 350, a display 355, and a memory 360. The memory 360 includes an operating system (OS) 361 and one or more applications 362.

[0062] The RF transceiver 310 receives an incoming RF signal transmitted by a gNB of the wireless network 100 from the antenna 305. The RF transceiver 310 down-converts the incoming RF signal to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 325, where the RX processing circuit 325 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. The RX processing circuit 325 transmits the processed baseband signal to speaker 330 (such as for voice data) or to processor / controller 340 for further processing (such as for web browsing data).

[0063] The TX processing circuit 315 receives analog or digital voice data from microphone 320 or other outgoing baseband data (such as network data, email or interactive video game data) from processor / controller 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal into an RF signal transmitted via the antenna 305.

[0064] The processor / controller 340 can include one or more processors or other processing devices and execute an OS 361 stored in the memory 360 in order to control the overall operation of UE 116. For example, the processor / controller 340 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceiver 310, the RX processing circuit 325 and the TX processing circuit 315 according to well-known principles. In some embodiments, the processor / controller 340 includes at least one microprocessor or microcontroller.

[0065] The processor / controller 340 is also capable of executing other processes and programs residing in the memory 360, such as operations for channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. The processor / controller 340 can move data into or out of the memory 360 as required by an execution process. In some embodiments, the processor / controller 340 is configured to execute the application 362 based on the OS 361 or in response to signals received from the gNB or the operator. The processor / controller 340 is also coupled to an I / O interface 345, where the I / O interface 345 provides UE 116 with the ability to connect to other devices such as laptop computers and handheld computers. I / O interface 345 is a communication path between these accessories and the processor / controller 340.

[0066] The processor / controller 340 is also coupled to the input device(s) 350 and the display 355. An operator of UE 116 can input data into UE 116 using the input device(s) 350. The display 355 may be a liquid crystal display or other display capable of presenting text and / or at least limited graphics (such as from a website). The memory 360 is coupled to the processor / controller 340. A part of the memory 360 can include a random access memory (RAM), while another part of the memory 360 can include a flash memory or other read-only memory (ROM).

[0067] Although Figure 3a illustrates an example of UE 116, various changes can be made to Figure 3a. For example, various components in Figure 3a can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. As a specific example, the processor / controller 340 can be divided into a plurality of processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Furthermore, although Figure 3a illustrates that the UE 116 is configured as a mobile phone or a smart phone, UEs can be configured to operate as other types of mobile or fixed devices.

[0068]

[0069] Figure 3b illustrates an example gNB 102 according to the present disclosure.

[0070] The embodiment of gNB 102 shown in Figure 3b is for illustration only, and other gNBs of Figure 1 can have the same or similar configuration. However, a gNB has various configurations, and Figure 3b does not limit the scope of the present disclosure to any specific implementation of a gNB. It should be noted that gNB 101 and gNB 103 can include the same or similar structures as gNB 102.

[0071] As shown in Figure 3b, gNB 102 includes a plurality of antennas 370a-370n, a plurality of RF transceivers 372a-372n, a transmission (TX) processing circuit 374, and a reception (RX) processing circuit 376. In certain embodiments, one or more of the plurality of antennas 370a-370n include a 2D antenna array. gNB 102 also includes a controller / processor 378, a memory 380, and a backhaul or network interface 382.

[0072] RF transceivers 372a-372n receive an incoming RF signal from antennas 370a-370n, such as a signal transmitted by UEs or other gNBs. RF transceivers 372a-372n down-convert the incoming RF signal to generate an IF or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 376, where the RX processing circuit 376 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. RX processing circuit 376 transmits the processed baseband signal to controller / processor 378 for further processing.

[0073] The TX processing circuit 374 receives analog or digital data (such as voice data, network data, email or interactive video game data) from the controller / processor 378. TX processing circuit 374 encodes, multiplexes and / or digitizes outgoing baseband data to generate a processed baseband or IF signal. RF transceivers 372a-372n receive the outgoing processed baseband or IF signal from TX processing circuit 374 and up-convert the baseband or IF signal into an RF signal transmitted via antennas 370a-370n.

[0074] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of gNB 102. For example, the controller / processor 378 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceivers 372a-372n, the RX processing circuit 376 and the TX processing circuit 374 according to well-known principles. The controller / processor 378 can also support additional functions, such as higher-level wireless communication functions. For example, the controller / processor 378 can perform a Blind Interference Sensing (BIS) process such as that performed through a BIS algorithm, and decode a received signal from which an interference signal is subtracted. A controller / processor 378 may support any of a variety of other functions in gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0075] The controller / processor 378 is also capable of executing programs and other processes residing in the memory 380, such as a basic OS. The controller / processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, the controller / processor 378 supports communication between entities such as web RTCs. The controller / processor 378 can move data into or out of the memory 380 as required by an execution process.

[0076] The controller / processor 378 is also coupled to the backhaul or network interface 382. The backhaul or network interface 382 allows gNB 102 to communicate with other devices or systems through a backhaul connection or through a network. The backhaul or network interface 382 can support communication over any suitable wired or wireless connection(s). For example, when gNB 102 is implemented as a part of a cellular communication system, such as a cellular communication system supporting 5G or new radio access technology or NR, LTE or LTE-A, the backhaul or network interface 382 can allow gNB 102 to communicate with other gNBs through wired or wireless backhaul connections. When gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow gNB 102 to communicate with a larger network, such as the Internet, through a wired or wireless local area network or through a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication through a wired or wireless connection, such as an Ethernet or an RF transceiver.

[0077] The memory 380 is coupled to the controller / processor 378. A part of the memory 380 can include an RAM, while another part of the memory 380 can include a flash memory or other ROMs. In certain embodiments, a plurality of instructions, such as the BIS algorithm, are stored in the memory. The plurality of instructions are configured to cause the controller / processor 378 to execute the BIS process and decode the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0078] As will be described in more detail below, the transmission and reception paths of gNB 102 (implemented using RF transceivers 372a-372n, TX processing circuit 374 and / or RX processing circuit 376) support aggregated communication with FDD cells and TDD cells.

[0079] Although Figure 3b illustrates an example of gNB 102, various changes may be made to Figure 3b. For example, gNB 102 can include any number of each component shown in Figure 3a. As a specific example, the access point can include many backhaul or network interfaces 382, and the controller / processor 378 can support routing functions to route data between different network addresses. As another specific example, although shown as including a single instance of the TX processing circuit 374 and a single instance of the RX processing circuit 376, gNB 102 can include multiple instances of each (such as one for each RF transceiver).

[0080] To make the objectives, technical solutions and advantages of the present application clearer, the implementations of the present application will be further described below in detail with reference to the drawings.

[0081] In the existing communication systems, a serving cell is configured with at most four UE-specific bandwidth parts (BWPs), only one BWP in these BWP can be activated, and the UE transmits signals or channels based on the activated BWP. In the CA / DC systems, the carrier where each activated BWP is located corresponds to one serving cell, and a plurality of carriers and a plurality of BWPs are aggregated by aggregating a plurality of serving cells.

[0082] The embodiments of the present application provide a method executed by a UE in a communication system and a method executed by a base station in a communication system. The methods enhance the existing multi-carrier technology, make the multi-carrier configuration in a serving cell become possible, and support the simultaneous transmission of the UE on a plurality of carriers in a serving cell. Specifically, in the embodiments of the present application, a serving cell is configured with a plurality of carriers, and the UE can perform simultaneous transmission on the plurality of carriers, thereby obtain a bandwidth gain, greatly improving the peak rate and achieving the effects similar to those of CA.

[0083] As a feasible implementation, a plurality of BWPs may be activated in a serving cell, and the plurality of activated BWPs are located on different carriers, respectively.

[0084] As another feasible implementation, cross-carrier activated BWP switching may be supported in a serving cell, and the UE obtains a diversity gain by dynamically switching transmission across carriers.

[0085] The technical solutions in the embodiments of the present application and the technical effects achieved by the technical solutions in the present application will be explained below by describing several exemplary implementations. It should be pointed out that the following implementations can be referred to, learned from or combined with each other, and the same terms, similar features and similar implementation steps in different implementations will not be repeated.

[0086]

[0087] Figure 4 is a flowchart of a method executed by a UE according to an embodiment of the present application.

[0088] In an embodiment of the present application, a method executed by a UE in a communication system is provided. As shown in Figure 4, this method includes the following steps.

[0089] In step S101, receiving a first signaling, the first signaling including information related to at least two activated bandwidth parts (BWPs), the at least two activated BWPs being located on different carriers, respectively, and the carriers where the at least two activated BWPs are located being configured in a same serving cell.

[0090] In step S102, performing uplink transmission or downlink reception on the at least two activated BWPs.

[0091] For example, the executed downlink reception includes physical downlink shared channel (PDSCH) reception, physical downlink control channel (PDCCH) reception, and / or channel state information reference signal (CSI-RS) reception and the like, and the executed uplink transmission includes physical uplink shared channel (PUSCH) transmission, physical uplink control information (PUCCH) transmission and / or sounding reference signal (SRS) transmission and the like. However, it is not limited thereto.

[0092] Optionally, the first signaling is indicated through at least one of a UE-specific radio resource control (RRC) signaling, a medium access control (MAC) control element (CE) and downlink control information (DCI).

[0093] That is, in the embodiment of the present application, in a serving cell, a plurality of BWPs can be activated simultaneously, and the plurality of activated BWPs are located on different carriers, respectively. One transport block (i.e., one PDSCH or PUSCH) is jointly transmitted by a plurality of activated carriers (or activated BWPs) in a serving cell, or a respective transport block (i.e., respective PDSCH or PUSCH) is transmitted on each activated carrier (or activated BWP), thereby obtaining a frequency diversity gain and / or improving the peak rate.

[0094] Optionally, the at least two activated BWPs are located in different bands, respectively.

[0095] In the embodiment of the present application, in the case of more spectrum resources of the operator, the rate of the terminal can be improved by aggregating the transmissions on a plurality of carriers.

[0096] In the above mode of aggregating a plurality of activated carriers provided in the embodiment of the present application, the UE can use at least two activated BWPs in a serving cell for transmission. Compared with aggregating activated BWPs in a plurality of serving cells for transmission, it is more flexible, the system can be better simplified, and the signaling overhead can be saved.

[0097] Specifically, compared with the aggregation of a plurality of carriers by aggregating the CA of a plurality of serving cells, the aggregation of a plurality of carriers in a serving cell by aggregating a plurality of activated BWPs has at least one of the following advantages.

[0098] 1. The broadcast signaling overhead is saved: for example, in the CA system, each serving cell needs to transmit some necessary broadcast signaling such as synchronization signal blocks (SSBs) and system information block 1(SIB1); while in the system where a plurality of activated BWPs are aggregated in a serving cell provided in the embodiment of the present application, it is only necessary to transmit a broadcast signaling on one carrier.

[0099] 2. The signaling for carrier activation and carrier aggregation is simplified: for example, in the CA system, a secondary cell can be activated through an RRC or MAC CE signaling; while in the system where a plurality of activated BWPs are aggregated in a serving cell provided in the embodiment of the present application, a BWP can be activated / deactivated through a physical layer signaling.

[0100] 3. Mobility measurement and management are simplified: for example, in the CA system, mobility measurement and management need to be performed for each serving cell; while in the system where a plurality of activated BWPs are aggregated in a serving cell provided in the embodiment of the present application, it is only necessary to perform mobility measurement and management for one carrier(for example, but not limited to, an anchor carrier, a preconfigured carrier or the like) in the serving cell.

[0101] It can be known from the above analysis that, compared with CA / DC, the aggregation of a plurality of activated BWPs in one serving cell is more flexible and can better simplify the system and save the signaling overhead.

[0102] In addition, in the existing 5G new radio (NR) communication system, one downlink carrier and at most two uplink carriers may be configured in a serving cell. When two uplink carriers are configured in a serving cell, one uplink carrier is referred to as a normal uplink (NUL), and the other uplink carrier is referred to as a supplement uplink (SUL). The SUL is generally located in a lower band and used for enhancing the coverage range of the uplink, and the SUL configuration is optional. Although the SUL and the NUL belong to a same serving cell, that is, a plurality of uplink carriers are configured in a serving cell, the UE can dynamically switch uplink transmission in the SUL and the NUL, but cannot perform uplink transmission simultaneously on both the SUL and the NUL. Thus, the SUL can only improve the coverage of the uplink, but cannot improve the peak rate of the uplink transmission.

[0103] The embodiment of the present application supports that a plurality of downlink carriers and more than two uplink carriers are configured in a serving cell. In addition, the biggest difference between the mode of activating a plurality of carriers in a serving cell provided in the embodiment of the present application and the SUL lies in that: PDSCH or PUSCH transmission can be simultaneously performed by using a plurality of activated carriers in a serving cell. In other words, one transport block (TB) can be transmitted across a plurality of carriers in a serving cell, that is, one PDSCH or PUSCH is transmitted across a plurality of carriers in a cell. Or, respective transport blocks are transmitted on a plurality of carriers in a serving cell, respectively, that is, respective PDSCHs or PUSCHs are transmitted on a plurality of carriers in a serving cell, respectively. Thus, the frequency diversity gain is obtained and / or the peak rate is improved.

[0104] In the embodiment of the present application, the BWP is essentially a segment of consecutive frequency resource, and the BWP may be replaced by other terms having the same meaning. For example, the BWP may be replaced by subband.

[0105] In the embodiment of the present application, the serving cell may also be referred to as a cell for short.

[0106] In the embodiment of the present application, a serving cell may be configured with a plurality of carriers, and the plurality of carriers may be aggregated for transmission through a physical layer signaling. Among the plurality of carriers, the carrier with a system information transmission function and / or an initial random access function is referred to as an anchor carrier, and other carriers are referred to as non-anchor carriers. The base station transmits synchronization information and cell system information (e.g., cell defining synchronization signal block (CD-SSB) and cell system information) on the anchor carrier, wherein the cell system information includes a first system information block and other system information blocks. The base station configures the information of other non-anchor carriers through the anchor carrier. When the anchor carrier is a TDD carrier, an anchor downlink carrier and an anchor uplink carrier are the same anchor carrier; and, when the anchor carrier is an FDD carrier, the anchor carrier includes an anchor downlink carrier and its paired anchor uplink carrier. On the anchor downlink carrier, an initial downlink BWP is configured; and, on the anchor uplink carrier, a PRACH resource pool for accessing the network and an initial uplink BWP are configured. Based on these configuration parameters, the UE may access the network through the anchor carrier.

[0107] In the embodiment of the present application, the UE is configured with a plurality of carriers, and at least one downlink BWP and / or at least one uplink BWP is configured on each carrier, wherein the plurality of carriers belong to a same serving cell, and the channel transmission of the UE may be dynamically switched on BWPs on the plurality of carriers. That is, the BWP on each carrier may be dynamically activated for channel transmission, thereby achieving the effect of quickly unloading UE on the plurality of carriers. The main process includes the following steps.

[0108] In step S201, receiving configuration information of a plurality of BWPs (downlink BWPs or uplink BWPs), wherein the plurality of BWPs may be located on different carriers and the plurality of carriers belong to a same serving cell.

[0109] In step S202, receiving DCI, and switching an activated BWP from one BWP on one carrier to another BWP on another carrier according to the indication of the DCI.

[0110] In step S203, performing PDSCH reception or PUSCH transmission based on the activated BWP after switching.

[0111] Optionally, the another BWP to which the activated BWP is switched may be a default BWP. As an example, the DCI may include information related to switching the activated BWP from one carrier to another carrier, and the UE performs cross-carrier switching according to the indication of the DCI to switch to the default BWP on another carrier. However, it is not limited thereto.

[0112] Or, optionally, the step S102 may specifically include: if at least one activated BWP in the at least two activated BWPs indicated by the first signaling and a previous activated BWP are different and not located on the same carrier, performing cross-carrier BWP switching, and performing uplink transmission or downlink reception on the at least two activated BWPs obtained after performing BWP switching.

[0113] Optionally, for the at least one activated BWP, cross-carrier BWP switching is performed.

[0114] That is, in the embodiment of the present application, the UE can activate at least two BWPs for transmission, and can also switch, based on the indication of the base station, an activated BWP from a first BWP on a first carrier to a second BWP on a second carrier. This is, the first BWP and the second BWP are located on different carriers. This BWP switching may also be referred to as cross-carrier BWP switching. In the embodiment of the present application, the indication of the base station may be carried through an MAC CE and / or DCI.

[0115] In the embodiment of the present application, the cross-carrier BWP switching or BWP aggregated transmission requires that the UE is supported by the corresponding capability. In order to realize the benefits of configuring a plurality of carriers in a serving cell, the UE may report at least one of the following capabilities to the base station:

[0116] (1) a capability of supporting BWP switching, the BWP before switching and the BWP after switching being located on different carriers, i.e., a capability of supporting cross-carrier BWP switching;

[0117] (2) a capability of supporting BWP switching, the BWP before switching and the BWP after switching being located in different bands, i.e., a capability of supporting cross-band BWP switching;

[0118] (3) a capability of supporting transmission on at least two activated BWPs, the at least two BWPs being located on different carriers, i.e., a capability of supporting simultaneous activation of BWPs on a plurality of carriers, wherein a plurality of BWPs on different carriers in a serving cell may be activated simultaneously, and the plurality of activated BWPs may be simultaneously used for transmission; and

[0119] (4) a capability of supporting transmission on at least two activated BWPs, the at least two BWPs being located in different bands, i.e., a capability of supporting simultaneous activation of BWPs in different bands, wherein a plurality of BWPs in different bands may be activated simultaneously, and the plurality of activated BWPs may be simultaneously used for transmission.

[0120] In the embodiment of the present application, the cross-carrier BWP switching needs to satisfy a preset condition. Optionally, switching an activated BWP from one BWP on one carrier to another BWP on another carrier includes at least one of the following conditions:

[0121] (1) A frequency domain interval between the carrier before switching and the carrier after switching does not exceed a first preset bandwidth, wherein the frequency domain interval between the carrier before switching and the carrier after switching may refer to the interval between the lowest frequency positions of two carriers.

[0122] (2) Both the carrier before switching and the carrier after switching are included in a second preset bandwidth, that is, the interval between the lowest frequency position of the lower frequency carrier and the highest frequency position of the higher frequency carrier in two carriers does not exceed the second preset bandwidth.

[0123] (3) A frequency domain interval between the BWP before switching and the BWP after switching does not exceed a third preset bandwidth, wherein the frequency domain interval between the BWP before switching and the BWP after switching may refer to the interval between the lowest frequency positions of two BWPs.

[0124] (4) Both the BWP before switching and the BWP after switching are included in a fourth preset bandwidth, that is, the interval between the lowest frequency position of the lower frequency BWP and the highest frequency position of the higher frequency BWP in two BWPs does not exceed the fourth preset bandwidth.

[0125] The preset bandwidth may be related to the band range. Optionally, for each preset bandwidth in the first preset bandwidth, the second preset bandwidth, the third preset bandwidth and / or the fourth preset bandwidth, the size of each preset bandwidth is different in FR1 and FR2 scenarios. For example, for the FR1 band, the preset bandwidth may use the first preset bandwidth (e.g., 100 MHz); while for the FR2 band, the preset bandwidth may use the second preset bandwidth (e.g., 400 MHz). And / or, the size of each preset bandwidth is different for UEs with different capabilities. In addition, the first preset bandwidth, the second preset bandwidth, the third preset bandwidth and / or the fourth preset bandwidth may be the same or different, and the sizes of these preset bandwidths are predefined.

[0126] In the embodiment of the present application, a certain processing delay is required for the UE to perform cross-carrier BWP switching.

[0127] Optionally, in a situation where the subcarrier interval between two switched BWPs remains unchanged, the performing cross-carrier BWP switching may specifically include: performing BWP switching within a first preset duration, wherein, the first preset duration corresponds to a switching delay of switching an activated BWP from one BWP on one carrier to another BWP on another carrier (i.e., cross-carrier BWP switching), wherein the length of the first preset duration is different from that of a second preset duration, and the second preset duration corresponds to a switching delay of switching an activated BWP from one BWP on one carrier to another BWP on the same carrier (i.e., intra-carrier BWP switching). That is, the size of the processing delay for cross-carrier BWP switching is different from that of the processing delay for intra-carrier BWP switching. Optionally, the former is larger.

[0128] Optionally, depending on whether two switched carriers belong to a same band, the cross-carrier BWP switching may also be classified into cross-band cross-carrier BWP switching and intra-band cross-carrier BWP switching; and, in a situation where the subcarrier interval between two switched BWPs remains unchanged, the performing cross-carrier BWP switching may specifically include at least one of the following situations:

[0129] if the BWP before switching and the BWP after switching are located in different bands, respectively, performing cross-carrier BWP switching within a third preset duration, wherein, the third preset duration corresponds to a switching delay of switching an activated BWP from one BWP on one carrier in one band to another BWP on another carrier in another band (i.e., cross-band cross-carrier BWP switching); and

[0130] if the BWP before switching and the BWP after switching are located in a same band, performing BWP switching within a fourth preset duration, wherein, the fourth preset duration corresponds to a switching delay of switching an activated BWP from one BWP on one carrier in one band to another BWP on another carrier in the same band (i.e., intra-band cross-carrier switching).

[0131] The length of the third preset duration is different from that of the fourth preset duration.

[0132] Optionally, the length of the third preset duration is greater than that of the fourth preset duration. That is, the size of the processing delay for cross-band cross-carrier switching is also different from that of the processing delay for intra-band cross-carrier switching. Optionally, the former is larger.

[0133] In addition, for each preset duration (which may refer to a BWP switching gap duration) in the first preset duration, the third preset duration and the fourth preset duration, the length of each preset duration is different for UEs with different capabilities (which may specifically refer to BWP switching capabilities). That is, different UE capabilities may correspond to BWP switching delays with different sizes.

[0134] In practical applications, in a situation where the subcarrier interval between two switched BWPs remains unchanged, the delay for intra-carrier BWP switching may correspond to a first preset value, the delay for intra-band cross-carrier BWP switching corresponds to a second preset value, and the delay for cross-band cross-carrier BWP switching corresponds to a third preset value. Different UE capabilities correspond to cross-carrier BWP switching delays with different sizes, that is, cross-carrier BWP switching delays with multiple sizes may be specified.

[0135] In the embodiment of the present application, the cross-carrier BWP switching may be controlled by a timer. Optionally, when the timer bwp-inactivitytimer expires and if the current activated BWP is not located on a preset carrier, the UE may perform BWP switching. If the UE receives data scheduling or an MAC protocol data unit (PDU), the UE restarts the timer bwp-inactivitytimer. In other words, within a fifth preset duration (i.e., a duration with a size of bwp-inactivitytimer), if the UE has not monitored the data scheduling or has not received the MAC PDU, that is, if the bwp-inactivitytimer expires, the UE performs BWP switching.

[0136] In the embodiment of the present application, the UE monitoring data scheduling or receiving an MAC PDU on an activated BWP includes at least one of the following situations:

[0137] 1) a PDCCH for scheduling downlink allocation or uplink grant scrambled with a cell-radio network temporary identity (C-RNTI) or a channel state information-radio network temporary identity (CSI-RNTI) is monitored on the activated BWP;

[0138] 2) a PDCCH for scheduling multicast downlink allocation scrambled with a group common radio network temporary identity (G-RNTI) or a group configured scheduling network temporary identity (G-CS-RNTI) is monitored on the activated BWP;

[0139] 3) a PDCCH for scheduling downlink allocation or uplink grant scrambled with a C-RNTI or CSI-RNTI corresponding to this activated BWP is monitored;

[0140] 4) an MAC PDU corresponding to the preconfigured uplink grant is transmitted on the activated BWP; and

[0141] 5) an MAC PDU corresponding to the preconfigured downlink allocation is received on the activated BWP.

[0142] Specifically, if a timer (i.e., bwp-InactivityTimer) associated with an activated BWP expires, the UE may perform at least one of the following BWP switching:

[0143] (1) if the carrier where the activated BWP is not on a preset carrier, switching the activated BWP to a first preset BWP on the preset carrier; and, if the first preset BWP is not configured, switching the activated BWP to an initial BWP on the preset carrier;

[0144] (2) if the activated BWP is not a second preset BWP on the carrier where the activated BWP is located, switching the activated BWP to the second preset BWP on the carrier where the activated BWP is located; and, if the second preset BWP is not configured, switching the activated BWP to an initial BWP on the carrier where the activated BWP is located, or switching the activated BWP to a first preset BWP on the preset carrier; and

[0145] (3) if the activated BWP is not a third preset BWP on a carrier group where the activated BWP is located, switching the activated BWP to the third BWP on the carrier group where the activated BWP is located; and, if the third preset BWP is not configured, switching the activated BWP to a first preset BWP on the preset carrier.

[0146] The first preset BWP (i.e., default BWP) is configured through a UE-specific RRC signaling; and / or, the second preset BWP is configured through a UE-specific RRC signaling, and the second preset BWP is configured separately for each carrier; and / or, the third preset BWP is configured through a UE-specific RRC signaling, and the third preset BWP is configured separately for each carrier group.

[0147] As an example, when the timer bwp-inactivitytimer expires and if the current activated BWP is not a default carrier (i.e., preset carrier), the UE should switch the activated BWP from a non-default carrier to a default BWP on a default carrier (in a situation where the default BWP has been configured through a UE-specific RRC signaling); and, if the default BWP is not configured, the UE should switch the activated BWP from a non-default carrier to an initial BWP on a default carrier, and the initial BWP is the first activated BWP on the default carrier.

[0148] As another example, the UE is configured with a plurality of downlink carriers, and at least one downlink BWP may be configured on each downlink carrier. Among the plurality of downlink BWPs, one downlink BWP may be configured as the default downlink BWP on this carrier for BWP fallback of this carrier. For example, if the bwp-inactivitytimer associated with an activated BWP expires and the current activated BWP is not the default downlink BWP on the carrier where the activated BWP is located, the UE switches the activated BWP to the default downlink BWP on the carrier where this downlink BWP is located; if no corresponding default downlink BWP is configured on the carrier where the downlink BWP is located, the UE switches the activated BWP to a default downlink BWP on a default carrier (e.g., anchor carrier); and, if no default downlink BWP is configured on the default carrier (e.g., anchor carrier), the UE switches the activated BWP to an initial downlink BWP on the default carrier (e.g., anchor carrier).

[0149] In the embodiment of the present application, the UE may perform BWP switching in the following way: if a timer associated with an activated BWP expires and the activated BWP is not a second preset BWP on the carrier where the activated BWP is located, switching the activated BWP to the second preset BWP on the carrier where the activated BWP is located; and / or, if a timer associated with an activated BWP expires, the activated BWP is a second preset BWP on the carrier where the activated BWP is located and the carrier where the activated BWP is located is not a preset carrier, switching the activated BWP to a first preset BWP on the preset carrier.

[0150] Optionally, the BWP switching process may correspond to at least two timers. If the first timer bwp-InactivityTimer-1 associated with the activated BWP expires and the activated BWP is not the default BWP (second preset BWP) on the carrier where the activated BWP is located, the activated BWP is switched to the default BWP (second preset BWP) on the carrier where the activated BWP is located; and, if the second timer bwp-InactivityTimer-2 associated with the BWP expires, the activated BWP is the second preset BWP on the carrier where the activated BWP is located, the activated BWP is the default BWP on the carrier where the activated BWP is located and the carrier where the activated BWP is located is not the preset carrier, the activated BWP is switched to the first preset BWP on the preset carrier, wherein the first timer and the second timer is the same timer, or the first timer and the second timer are different timers. That is, the sizes of the two timers are configured separately, and may be different.

[0151] In the embodiment of the present application, if the carrier after switching is configured with a plurality of BWPs, the UE may switch the activated BWP to a fourth preset BWP in the plurality of BWPs. Wherein, the fourth preset BWP may also be a default BWP, and is preconfigured through a UE-specific RRC signaling. That is, for cross-carrier BWP switching, when it is switched from one carrier to another carrier, it needs to be firstly switched to a default BWP on the another carrier. For example, if the base station instructs the UE to switch from one carrier to another carrier, the UE switches to a fourth preset BWP on this carrier.

[0152] In the above embodiments, the preset carrier (i.e., default carrier) includes at least one of the following: an anchor carrier, a carrier with a smallest index, and a carrier preconfigured through high layer signaling; and, the first preset BWP, the second preset BWP, the third preset BWP and / or the fourth preset BWP (which all may be interpreted as default BWPs) includes at least one of the following: an initial BWP, a BWP with a smallest index, and a BWP preconfigured through high layer signaling.

[0153] In the embodiment of the present application, in a serving cell, the UE may be configured with a plurality of carriers, and one or more downlink BWPs and / or one or more uplink BWPs may be configured on each carrier, wherein the plurality of carriers belong to the same serving cell. The uplink BWPs on the plurality of carriers may be aggregated for PUSCH transmission, that is, the transmission bandwidth of the PUSCH may span the uplink BWPs on the plurality of carriers; or, the PUSCH is transmitted on the uplink BWPs on the plurality of carriers, respectively. The two transmission modes can greatly improve the uplink rate of the UE. And / or, the downlink BWPs on the plurality of carriers may be aggregated for PDSCH transmission, that is, the transmission bandwidth of the PDSCH may span the downlink BWPs on the plurality of carriers; or, the PDSCH is transmitted on the downlink BWPs of the plurality of carriers, respectively. The two transmission modes can greatly improve the downlink rate of the UE. The above transmission modes can be realized by activating a plurality of BWPs in a serving cell. The main process includes the following steps.

[0154] In step S301, receiving configuration information of one or more BWPs (downlink BWPs or uplink BWPs) on a plurality of carriers, wherein the plurality of carriers belonging to a same serving cell.

[0155] In step S302, receiving a related signaling for activating BWPs on the plurality of carriers, wherein the plurality of activated BWPs being located on different carriers, respectively.

[0156] In step S303, performing PDSCH reception or PUSCH transmission based on the plurality of activated BWPs.

[0157] In the embodiment of the present application, at least two carriers may be configured in a serving cell, and at least one BWP may be activated on each carrier. One activated BWP in the at least two activated BWPs may be referred to as a first activated BWP, and other activated BWPs may be referred to as second activated BWPs. That is, the at least two activated BWPs include one first activated BWP and at least one second activated BWP. Optionally, the at least two activated BWPs include at least one of the following situations:

[0158] (1) The first activated BWP is located on an anchor carrier.

[0159] Wherein, the anchor carrier has a system information transmission function and / or an initial random access function. The activated BWP on the anchor carrier may also be used as the first activated BWP, which may also be referred to as the normal BWP or primary BWP; and, the BWP on the non-anchor carrier is used as the second activated BWP, which may also be referred to as the supplement BWP or secondary BWP.

[0160] Optionally, the first carrier is a carrier with a smallest index among the carriers where the plurality of activated BWPs are located; or, the first carrier is a carrier preconfigured through high layer signaling among the carriers where the plurality of activated BWPs are located.

[0161] (2) The PDSCH or PUSCH transmitted on the second activated BWP uses the related channel transmission configuration on the first activated BWP.

[0162] Optionally, the first activated BWP may be independently used for channel transmission, and the second activated BWP cannot be independently used for channel transmission. The second activated BWP is mainly used for supplementing the bandwidth of the first activated BWP, that is, the second activated BWP can be used depending on the first activated BWP, so as to achieve the purpose of expanding the bandwidth of the first activated BWP. Thus, the configuration information of the second activated BWP may only include the bandwidth size and the frequency domain position information, but does not need to include the related information of channel transmission, for example, the related information of the subcarrier interval, the control resource set (CORESET), the PDCCH search space, the PDSCH configuration, the PUSCH configuration, the physical uplink control channel (PUCCH) configuration or the like. The PDSCH or PUSCH transmitted on the second activated BWP may use the related channel transmission configuration on the first activated BWP.

[0163] Optionally, the first activated BWP and the second activated BWP may be independently used for channel transmission, that is, the configuration of the first activated BWP and the second activated BWP may reuse the existing BWP configuration. If a PDSCH or PUSCH is transmitted on the second activated BWP, the PDSCH or PUSCH uses the related channel transmission configuration on the second activated BWP; and, if a PDSCH or PUSCH is transmitted across the first activated BWP and the second activated BWP, the PDSCH or PUSCH uses the related channel transmission configuration on the first activated BWP.

[0164] (3) The PDCCH and / or PUCCH is only transmitted on one BWP in the at least two activated BWPs, wherein the BWP that transmits the PDCCH and / or PUCCH is fixed as the first activated BWP or preconfigured as one of the at least two activated BWPs.

[0165] Optionally, the UE monitors a PDCCH and / or transmits a PUCCH on only the first activated BWP, wherein the PDCCH on the first activated BWP may schedule the first activated BWP and the second activated BWP, and the PUCCH on the first activated BWP may transmit uplink control information related to the first activated BWP and the second activated BWP; or, the UE monitors PDCCH and / or transmits PUCCH on only one BWP in a plurality of activated BWPs, wherein the BWP for monitoring the PDCCH and / or transmitting the PUCCH is a preconfigured BWP in the plurality of activated BWPs, the PDCCH monitored on this BWP may schedule all activated BWPs, and the PUCCH transmitted on this BWP may transmit the uplink control information related to all activated BWPs.

[0166] (4) The band interval between the first activated BWP and the second activated BWP does not exceed a fifth preset bandwidth.

[0167] The frequency domain resource transmission data channel across a plurality of BWPs may also be referred to as BWP aggregated transmission. The BWP aggregation refers to the aggregation of one first activated BWP and at least one second activated BWP. The transmission of the data channel may be based on the total bandwidth after BWP aggregation. For example, a PDSCH or PUSCH may be transmitted across the first activated BWP and at least one second activated BWP. Optionally, the first activated BWP is aggregated with at most two second activated BWPs for channel transmission, and the two second activated BWPs are located on two sides of the band of the first activated BWP, respectively. That is, the first activated BWP is aggregated with at most one second activated BWP above the band, and the first activated BWP is also aggregated with at most one second activated BWP under the band.

[0168] Optionally, only when the band interval between the first activated BWP and the second activated BWP is less than or equal to the fifth preset bandwidth, the first activated BWP and the second activated BWP are allowed to be aggregated for channel transmission, and the size of the fifth preset bandwidth is a standard predefined value.

[0169] (5) Both the first activated BWP and the second activated BWP are included in a sixth preset bandwidth.

[0170] Optionally, only when the overall bandwidth of the first activated BWP and the second activated BWP is less than or equal to the sixth preset bandwidth, the first activated BWP and the second activated BWP are allowed to be aggregated for channel transmission, and the size of the sixth preset bandwidth is a standard predefined value.

[0171] In the embodiment of the present application, the first signaling may include first DCI, and the first DCI includes the index of the first activated BWP and / or the index of the second activated BWP. Optionally, the first DCI may include one first indication domain and at least one second indication domain; the first indication domain is used to indicate the first activated BWP and may also be referred to as a first activated BWP indication domain; and, the second indication domain is used to indicate the second activated BWP and may also be referred to as a second activated BWP indication domain.

[0172] That is, the first activated BWP and the second activated BWP may be dynamically activated through the first DCI signaling. For example, the first indication domain included in the first DCI is used to indicate the index of the first activated BWP, and the second indication domain included in the first DCI is used to indicate the index of the second activated BWP.

[0173] Optionally, whether the first DCI includes the index of the second activated BWP, and / or the number of the second activated BWP are preconfigured through high layer signaling. For example, whether the first DCI includes the second indication domain, and / or the number of the second indication domain included in the DCI are preconfigured through high layer signaling.

[0174] Optionally, all BWPs on all carriers in the serving cell where the UE is located are uniformly numbered. The first indication domain included in the first DCI indicates one of all BWPs as the first activated BW, and one or more second indication domains included in the first DCI indicate one or more of all BWPs as the second activated BWP, respectively. The first DCI may realize the switching of BWPs on different carriers by indicating the indexes of BWPs, wherein the BWPs are sequentially numbered in the order of the indexes of the carriers. For example, if the UE is configured with at most Nc carriers and at most Nb BWPs are configured on each carrier, the UE is configured with total Nc*Nb BWPs.

[0175] In an optional implementation, the first indication domain or the second indication domain in the first DCI includes {log2(Nc*Nb)} bits for indicating one BWP from all the Nc*Nb BWPs.

[0176] In another optional implementation, the base station configures a BWP set containing Nt BWPs from Nc*Nb downlink BWPs through an RRC signaling or MAC CE signaling, and the first indication domain or the second indication domain in the first DCI includes {log2(Nt)} bits for indicating one BWP from the preconfigured BWP set.

[0177] As an example, if it is assumed that Nt=4, the first indication domain or the second indication domain in the first DCI includes 2 bits for indicating the activated BWP. When the indication value of the BWP domain is "00", the first BWP in the preconfigured BWP set is activated; when the indication value of the BWP domain is "01", the second BWP in the preconfigured BWP set is activated; when the indication value of the BWP domain is "10", the third BWP in the preconfigured BWP set is activated; and, when the indication value of the BWP domain is "11", the fourth BWP in the preconfigured BWP set is activated.

[0178] Optionally, only the BWP on the preset carrier (e.g., anchor carrier) can be indicated as the first activated BWP, and only the BWP on the non-preset carrier (e.g., non-anchor carrier) can be indicated as the second activated BWP. For example, the BWPs on a plurality of non-anchor carriers are uniformly numbered. If it is assumed that two BWPs are configured on the first non-anchor carrier and two BWPs are configured on the second non-anchor carrier, there are total four BWPs on the non-anchor carriers. The second indication domain included in the above first DCI may indicate one BWP from the four BWPs as the second activated BWP by using 2 bits.

[0179] In the embodiment of the present application, in addition to the index of the first activated BWP and / or the index of the second activated BWP, the first DCI may also include the index of the carrier where the first activated BWP is located and / or the index of the carrier where the second activated BWP is located. Optionally, the first DCI may further include one third indication domain and / or at least one fourth indication domain, the third indication domain is used to indicate the carrier where the first activated BWP is located (e.g., the index of the carrier where the first activated BWP is located), and the fourth indication domain is used to indicate the carrier where the second activated BWP is located (e.g., the index of the carrier where the second activated BWP is located).

[0180] For example, the UE is configured with at most Nc carriers, at most Nb BWPs are configured on each carrier, the third indication domain or the fourth indication domain in the first DCI includes {log2(Nc)} bits for indicating the index of the carrier, and the first indication domain or the second indication domain in the first DCI includes {log2(Nb)} bits for indicating the index of the BWP on the corresponding carrier. Wherein,{.} represents rounding up, the index of the anchor carrier may be fixed as #0, and the index of the non-anchor carrier is numbered from #1. However, it is not limited thereto.

[0181] Optionally, the first activated BWP may also be dynamically switched through the DCI, in addition to being configured through high layer signaling (RRC signaling and / or MAC CE); and, the second activated BWP can only be configured through high layer signaling, the second activated BWP cannot be dynamically switched through the DCI. That is, the DCI may only include the first activated BWP indication domain, but does not include the second activated BWP indication domain.

[0182] Optionally, there may be a binding relationship between two BWPs. When one BWP (first BWP) is activated, the other BWP (second BWP) is also activated by default. For example, it may be semi-statically configured that there is a correspondence between first BWPs and second BWPs, and the second BWP corresponding to the first BWP is preconfigured through high layer signaling. If the first signaling indicated that the first BWP is activated as the first activated BWP, the second BWP corresponding to the first BWP is also activated as the second activated BWP by default.

[0183] In the above at least one embodiment, the BWP aggregated transmission (e.g., the transmission of a PDSCH or PUSCH across a plurality of activated BWPs) may be configured through high layer signaling. In addition, the DCI may also include one bit for indicating whether the BWP aggregated transmission configured by a high layer is applied, that is, the DCI signaling may override the high layer signaling. For example, in a situation where the BWP aggregated transmission is configured through high layer signaling, if the DCI indicates that the BWP aggregated transmission is applied, the frequency domain resource allocation domain in the DCI is indicated based on the aggregated BWP bandwidth, i.e., based on the total bandwidth of the plurality of activated BWPs; and, if the DCI indicates that the BWP aggregated transmission is not applied, the frequency domain resource allocation domain in the DCI is indicated based on the bandwidth of the first activated BWP.

[0184] In the embodiment of the present application, if the first signaling may be used for indicating that one BWP group is activated, all BWPs in the BWP group are activated, wherein the BWP group is preconfigured through high layer signaling.

[0185] Each BWP group includes one first activated BWP and at least one second activated BWP, and the BWP group may also be called a virtual BWP, or a BWP combination or a BWP aggregation.

[0186] Optionally, the first signaling includes second DCI, and the second DCI includes the index of the activated BWP group. Optionally, the second DCI includes a fifth indication domain, and the fifth indication domain is used for indicating the activated BWP group (e.g., the index of the activated BWP group). That is, the first signaling (e.g., second DCI) may activate all BWPs in one BWP group by indicating the index of the BWP group. For example, two BWP combinations, including a first BWP group with an index of #0 and a second BWP group with an index of #1, may be configured through high layer signaling, and the fifth indication domain in the second DCI indicates one of the two BWP combinations by using 1 bit.

[0187] In addition, the fifth indication domain in the second DCI may be used for indicating to activate one BWP group or one BWP. For example, the second DCI includes the index of the activated BWP group and the index of the activated BWP, and the index of the activated BWP group and the index of the activated BWP are indicated by different state values of the same indication domain. Optionally, some state values of the fifth indication domain in the second DCI are used for indicating the activated BWP group (e.g., the index of the activated BWP group), and other state values of the fifth indication domain are used for indicating the activated BWP (e.g., the index of the activated BWP). In other words, the second DCI may realize the dynamic switching between activating a plurality of BWPs and activating one BWP by indicating the index of the BWP group or the BWP. For example, the fifth indication domain in the second DCI includes 2 bits. When the indication value is "00" or "01", one BWP in two preconfigured BWPs is activated; and, when the indication value is "10" or "11", one BWP combination in two preconfigured BWP combinations is activated.

[0188] In the embodiment of the present application, the virtual BWP may be defined as a group of discontinuous PRBs across carriers, that is, the virtual BWP may span a plurality of carriers. The virtual BWP includes a segment of continuous PRB in each carrier, but the PRBs between adjacent carriers are discontinuous. The virtual BWP and the existing BWP may have similar characteristics. For example, the virtual BWP may reuse the existing BWP configuration. The difference lies in that the PRBs included in the existing BWP are located on one carrier and are continuous, while the PRBs included in the virtual BWP are located on a plurality of carriers and are discrete between carriers. This difference will affect the allocation mode of frequency domain resources. Essentially, the virtual BWP may be interpreted as the aggregation of each segment of frequency domain resource on a plurality of carriers. That is, the virtual BWP may be interpreted as the aggregation of a plurality of BWPs, so the virtual BWP may also be referred to as BWP aggregation or BWP combination.

[0189] Optionally, the resource scheduling on the virtual BWP may use the existing resource allocation type. For example, in the frequency domain resource allocation type (RA type) 0, the scheduling DCI indicates the allocated RBG through a bit map, and may support continuous or discrete RBG resource allocation. One RBG includes X continuous PRBs. Here, it is necessary to divide RBGs of all PRBs across a plurality of carriers in the virtual BWP. In order to coexist with other scheduling UEs on each carrier (here, other scheduling UEs may only operate on one carrier), the virtual BWP uses different RBG sizes for RBG division on each carrier. For example, the RBG size used on each carrier is determined based on the number of PRBs included in the virtual BWP on each carrier. Or, the virtual BWP uses the same RBG size for RBG division on all carriers. For example, this RBG size is determined based on the total number of PRBs included in the virtual BWP.

[0190] In addition, considering the compatibility with other UEs based on one activated carrier transmission, the RBG division of the virtual BWP on each carrier should be aligned with the starting position of the first carrier resource block (CRB) of the carrier, that is, the RBG division of the virtual BWP on each carrier should be aligned based on the starting position of CRB0 (i.e., the first CRB) of the carrier; or, the RBG division of the virtual BWP on each carrier should be aligned with the starting position of CRB0 of a reference carrier. The reference carrier may be an anchor carrier, a carrier with a lowest frequency, a carrier with a smallest index, a preconfigured carrier or the like.

[0191] Optionally, the scheduling on the virtual BWP may reuse the existing RA Type1. That is, the scheduling DCI jointly indicate the starting virtual resource block (VRB) position and the number of continuous VRBs by using a start and length indicator value (SLIV), wherein there are two mapping modes between VRBs and PRBs. The first mapping mode is non-interlaced mapping, that is, a group of continuous VRBs corresponds to a group of continuous PRBs, and resource scheduling only supports continuous RPB allocation. The second mapping mode is interlaced mapping. That is, a group of continuous VRBs may correspond to a group of discrete PRBs, and resource scheduling may support continuous or discrete PRB allocation. For the interlaced mapping between VRBs and PRBs, in the virtual BWP, in order to be better compatible with other UEs based on one carrier service transmission, the VRBs and PRBs in the virtual BWP may be mapped in a segmented and interlaced manner. For example, segmented regions may be PRBs in one carrier. That is, there is an interlaced mapping relationship between a group of continuous PRBs and a group of corresponding continuous VRBs in each carrier.

[0192] For example, it is assumed that the virtual BWP consists of each segment of continuous PRBs on three carriers. The PRBs of the virtual BWP on the first carrier are numbered as #0 to #(N1-1), that is, the virtual BWP includes total N1 PRBs on the first carrier; the PRBs of the virtual BWP on the second carrier are numbered as #N1 to #(N2+N1-1), that is, the virtual BWP includes total N2 PRBs on the second carrier; and, the PRBs of the virtual BWP on the third carrier are numbered as #(N1+N2) to #(N3+N2+N1-1), that is, the virtual BWP includes total N3 PRBs on the third carrier. The VRBs and PRBs may be mapped in a segmented and interlaced manner. For example, the VRBs numbered as #0 to #(N1-1) are mapped to the PRBs numbered as #0 to #(N1-1) in an interlaced manner, the VRBs numbered as #N1 to #(N2+N1-1) are mapped to the PRBs numbered as #N1 to #(N2+N1-1) in an interlaced manner, and the VRBs numbered as #(N1+N2) to #(N3+N2+N1-1) are mapped to the PRBs numbered as #(N1+N2) to #(N3+N2+N1-1) in an interlaced manner. However, the VRB numbered as #m does not necessarily correspond to the PRB numbered as #m. That is, the VRBs and PRBs are mapped in a segmented and interlaced manner, and the segmented regions are in carriers. In each carrier, the used interlaced mapping rule may reuse the interlaced mapping rule of the existing system.

[0193] In the embodiment of the present application, the method executed by a UE in a communication system may further include the following steps.

[0194] In step S105, receiving a second signaling, wherein the second signaling including information indicating whether the at least one second activated BWP is in a dormant state.

[0195] The second signaling is indicated through at least one of MAC CE and DCI.

[0196] In other words, among of a plurality of activated BWPs, except for a particular activated BWP (i.e., first activated BWP), other activated BWPs may be indicated as being in the dormant state. Once an activated BWP is indicated as being in the dormant state, many signals or channels on this BWP are prohibited from being transmitted. For example, if the second activated BWP is in the dormant state, the behavior executed by the UE includes at least one of the following:

[0197] (1) stopping the timer bwp-InactivityTimer associated with the second activated BWP;

[0198] (2) not monitoring the PDCCH on the second activated BWP;

[0199] (3) not monitoring the PDCCH for scheduling the second activated BWP;

[0200] (4) not reporting channel state information (CSI) on the second activated BWP;

[0201] (5) not transmitting an uplink shared channel (UL-SCH) on the second activated BWP;

[0202] (6) not transmitting a random access channel (RACH) on the second activated BWP;

[0203] (7) not transmitting a PUCCH on the second activated BWP;

[0204] (8) clearing a preconfigured downlink grant and a preconfigured type 2 uplink grant on the second activated BWP; and

[0205] (9) suspending (interrupting) a preconfigured type 1 uplink grant on the second activated BWP.

[0206] The particular activated BWP (first activated BWP) includes, but not limited to, at least one of the following: an activated BWP on an anchor carrier; an activated BWP on a carrier with a smallest index; an activated BWP on a carrier with an index of 0; an activated BWP with a lowest frequency; an activated BWP on a preconfigured carrier (e.g., preconfigured through high layer signaling); and, an activated BWP configured with PDCCH and / or PUCCH transmission. These BWPs cannot be indicated as being in the dormant state after being activated.

[0207] In the embodiment of the present application, it is indicated through an MAC CE or DCI that the activated BWP enters or exits the dormant state. In an example, it is indicated by 1 bit in the DCI whether the activated BWP is in the dormant state. For example, when the indication value is "1" (or "0"), it indicates that the corresponding activated BWP does not enter the dormant state (i.e., the normal activated BWP state); and, when the indication value is "0" (or "1"), it indicates that the corresponding activated BWP enters the dormant state. If the current state of the activated BWP is different from the state for entering indicated by the DCI, the UE needs to switch the state of the activated BWP; and, if the current state of the activated BWP is the same as the state for entering indicated by the DCI, the UE remains the state of the activated BWP.

[0208] In addition, the second signaling may include third DCI, and the third DCI includes at least one of the following information:

[0209] whether each second activated BWP is in the dormant state;

[0210] the length of the duration of the dormant state of each second activated BWP; and

[0211] whether each second activated BWP is in the dormant state and / or the length of the duration of the dormant state, indicated for a plurality of UEs separately.

[0212] Optionally, the above information may be used separately or in combination. As an example, the third DCI may include at least one of the following indication domains:

[0213] (1) Sixth indication domain: the sixth indication domain includes at least one bit, and each bit is used for separately indicating whether each second activated BWP is in the dormant state.

[0214] As an example, the third DCI may also include a plurality of (e.g., N, N>1) bits for separately indicating whether different activated BWPs are in the dormant state. For example, a plurality of bits indicate whether other activated BWPs except for a particular activated BWP (i.e., the first activated BWP) are in the dormant state, wherein each information bit corresponds to one activated BWP.

[0215] (2) Seventh indication domain: the seventh indication domain includes at least one information block, each information block includes at least two bits, and each information block is used for separately indicating whether each second activated BWP is in the dormant state and the length of the duration of the dormant state.

[0216] As an example, the base station indicates through the third DCI whether the activated BWP enters the dormant state and remains for a preset duration after entering the dormant state. After the preset duration, this activated BWP may exit the dormant state. For example, it is indicated by 1 bit whether the corresponding activated BWP enters the dormant state for a preset duration. When the indication value is "1" (or "0"), it indicates that the corresponding activated BWP enters the dormant state and remains for a preset time length; and, when the indication value is "0" (or "1"), it indicates that the corresponding activated BWP does not enter the dormant state (i.e., the normal activated BWP state). Wherein, the preset time length may be preconfigured through high layer signaling or indicated through the third DCI.

[0217] Optionally, the third DCI includes an indication domain (e.g., the seventh indication domain); a state value of the indication domain indicates that the second activated BWP does not enter the dormant state, and other state values of the indication domain indicate that the second activated BWP enters the dormant state and remains for a preset time length corresponding to the state value; different state values correspond to different preset time lengths; and, the preset time length is configured through a UE-specific RRC signaling.

[0218] (3) Eighth indication domain: the eighth indication domain includes at least one information block, and each information block is used for separately indicating whether at least one second activated BWP of different UEs is in the dormant state, and / or the length of the duration of the dormant state.

[0219] The third DCI may further include a plurality of (e.g., M, M>1) information blocks for separately indicating the dormant state of activated BWPs of different UEs, and each information block includes N bits for separately indicating whether different activated BWPs are in the dormant state and / or indicating that the dormant state remains for a preset time length after entering the dormant state, wherein each information block corresponds to one UE or UE group, and the UE determines the starting position of its respective information block in the third DCI according to the indication of the high layer signaling.

[0220] In the above at least one embodiment, the third DCI is transmitted on the first activated BWP. Since the transmission of the third DCI for carrying the indication information of the dormant state of the BWP should not be affected by the dormant BWP, the third DCI may be transmitted on only the particular activated BWP (i.e., the first activated BWP), that is, the third DCI cannot be transmitted on the second activated BWPs that are possibly indicated as being the dormant state. For example, the third DCI is transmitted on the first activated BWP on the anchor carrier to indicate the dormant state of the activated BWPs on other carriers.

[0221] Or, the third DCI for carrying the indication information of the dormant state of the BWP may be transmitted on any activated BWP that does not enter the dormant state (i.e., in the non-dormant state). For example, for an activated BWP, if a PDCCH is configured on this activated BWP, the PDCCH for scheduling a PDSCH or PUSCH may carry the information for indicating whether the activated BWP where the PDCCH is located and / or other activated BWPs enter the dormant state, and / or enters the dormant state for a preset time length.

[0222] In the embodiment of the present application, for each second activated BWP, if the timer (i.e., bwp-inactivitytimer) associated with the second activated BWP expires, the second activated BWP is switched to the dormant state. Specifically, it is controlled by the timer whether the activated BWP enters the dormant state. For example, a plurality of BWPs are activated simultaneously, and each second activated BWP has the corresponding timer (e.g., bwp-inactivitytimer or bwp-dormanttimer) for controlling whether it enters the dormant state. When the timer associated with one activated BWP expires, the UE should switch this activated BWP to the dormant state. Here, if the UE receives data scheduling or an MAC PDU on one activated BWP, the UE restarts the timer associated with this activated BWP. In other words, within a preset duration (the length of the duration is the size of the timer), if the UE has not monitored the data scheduling or has not received the MAC PDU on the activated BWP, that is, if the timer (e.g., bwp-inactivitytimer or bwp-dormanttimer) associated with the activated BWP expires, the UE switches this activated BWP to the dormant state.

[0223] In the embodiment of the present application, in order to enable the base station to dynamically indicate according to the channel state on the dormant BWP that the dormant BWP exits the dormant state, i.e., indicating that one dormant BWP exits the dormant state (i.e., entering the normal activated BWP state again), the base station may configure or trigger the reporting of the channel status information (CSI) of the dormant BWP. Optionally, the CSI on the second activated BWP in the dormant state is reported on other activated BWPs that are not in the dormant state. For example, the base station may configure periodic CSI measurement reporting and / or trigger aperiodic CSI reporting for the dormant BWP, where the PUCCH or PUSCH resource used for CSI reporting is configured on other activated BWPs.

[0224] In the embodiment of the present application, if BWP switching is performed for any second activated BWP in the dormant state, the second activated BWP after switching is continuously remained in the dormant state, or exits the dormant state.

[0225] That is, when an activated BWP is indicated as being in the dormant state, the base station can still indicate to switch the dormant activated BWP to another BWP through a signaling (e.g., DCI). For example, the UW has a plurality of activated BWPs located on different carriers. If it is assumed that the activated BWP on a non-anchor carrier is indicated as being in the dormant state, the UE may receive, from other activated BWPs, a signaling for indicating to switch the dormant activated BWP to another BWP. In an example, after the UE switches the activated BWP on this non-anchor carrier to another BWP, another activated BWP should exit the dormant state, i.e., being in the normal activated BWP state. That is, when the activated BWP is switched, the original dormant state is no longer applicable. In another example, after the UE switches the activated BWP on this non-anchor carrier to another BWP, another activated BWP should continuously remain in the dormant state until it receives the signaling indication to exit the dormant state or exits the dormant state at the end of a ninth preset duration.

[0226] In the embodiment of the present application, the UE is configured with a plurality of carriers in a serving cell, one or more BWPs may be configured on each carrier, the BWPs on the plurality of carriers may be activated, and at most one BWP is activated on each carrier. The PDSCH / PUSCH of the activated BWP on the second carrier may be scheduled by the PDCCH of the activated BWP on the first carrier. This scheduling mode is referred to as cross-carrier scheduling.

[0227] In an optional implementation, the UE has a plurality of activated BWPs in a serving cell, the plurality of activated BWPs are located on different carriers, respectively, and only one activated BWP in the plurality of activated BWPs is configured with PDCCH transmission. That is, the UE monitors the PDCCH on only one activated BWP, without monitoring the PDCCH on all activated BWPs. The PDSCH / PUSCH on the activated BWP not configured with the PDCCH is scheduled by this PDCCH. That is, the PDCCH for scheduling all activated BWPs is monitored on one BWP in the at least two activated BWPs. Wherein, if the BWP that monitors the PDCCH is fixed as the first activated BWP, the activated BWP configured with the PDCCH may be the first activated BWP. That is, the PDCCH for scheduling all activated BWPs is monitored on the first activated BWP. Wherein, the first activated BWP may be a primary activated BWP, an activated BWP with the smallest index, an activated BWP on an anchor carrier, an activated BWP on a carrier with an index of #0, an activated BWP on a carrier with a smallest index in a plurality of carriers, an activated BWP on a carrier with a lowest frequency, or a preconfigured activated BWP. Or, the BWP that monitors the PDCCH may be preconfigured as one of the at least two activated BWPs.

[0228] Wherein, the DCI carried by the PDCCH may include scheduling information related to a plurality of PDSCHs or a plurality of PUSCHs, i.e., for scheduling the transmission of a plurality of PDSCHs or a plurality of PUSCHs. The plurality of PDSCHs or the plurality of PUSCHs are scheduled on different activated BWPs. That is, the UE may transmit a plurality of PDSCHs or a plurality of PUSCHs on the respective allocated resources of a plurality of scheduled activated BWPs. And / or, the DCI carried by the PDCCH includes scheduling information related to one PDSCH or PUSCH, i.e., for scheduling the transmission of one PDSCH or PUSCH. This PDSCH or PUSCH is scheduled on one activated BWP, or this PDSCH or PUSCH is scheduled on a plurality of activated BWPs. That is, the UE may transmit one PDSCH or PUSCH on the total allocated resources of a plurality of scheduled activated BWPs.

[0229] Optionally, the monitored PDCCH includes information related to the scheduled activated BWP and / or the carrier where the scheduled activated BWP is located. Since the scheduling DCI and the scheduled PDSCH or PUSCH may not be located on the same carrier, the scheduling DCI may include the indication information related to the scheduled activated BWP and / or the carrier where the scheduled activated BWP is located, and the number of the scheduled activated BWP may be less than the number of the activated BWP. For example, it is assumed there are total four activated BWPs. In a case where only one activated BWP is scheduled, the scheduling DCI may include a 2-bit indication domain for indicating that one of the four activated BWPs is scheduled. Or, in a case where one or more activated BWPs are scheduled, the scheduling DCI may include a 4-bit indication domain, and it is indicated by a bit map that which activated BWPs in the four activated BWPs are scheduled. In other words, each bit corresponds to one activated BWP. When the indication value is "1", it indicates that the corresponding activated BWP is scheduled; and, when the indication value is "0", it indicates that the corresponding activated BWP is not scheduled. Or, in a case where one or more activated BWPs are scheduled, the scheduling DCI may include an indication domain for indicating the index of the scheduled BWP set, wherein the BWP set is preconfigured through high layer signaling.

[0230] In the embodiment of the present application, the UE has a plurality of activated BWPs in a serving cell, and the plurality of activated BWPs are located on different carriers, respectively. The Hybrid Automatic Repeat Request ACKnowledge Character (HARQ-ACK) feedback corresponding to the PDSCH on the second carrier may be fed back on the first carrier. This situation is referred to as cross-carrier HARQ-ACK feedback. In addition, other uplink control information may also be operated similar to HARQ-ACK, i.e., cross-carrier uplink control information transmission.

[0231] In an optional implementation, HARA-ACK feedbacks corresponding to PDSCHs on all activated BWPs may be transmitted on one of the at least two activated BWPs, wherein the BWP that transmits the HARQ-ACK feedbacks is fixed as the first activated BWP or preconfigured as one of the at least two activated BWPs. That is, it may be configured that the HARQ-ACK corresponding to PDSCHs on a plurality of activated downlink BWPs is transmitted on the same activated uplink BWP.

[0232] Optionally, the HARQ-ACK information corresponding to PDSCHs on all activated BWPs is included in a same codebook for feedback, that is, the HARQ-ACK corresponding to PDSCHs on the plurality of activated downlink BWPs may be fed back to the base station based on the same codebook. The order of the HARQ-ACK information in the codebook is determined in at least one of the following ways:

[0233] (1) the corresponding HARQ-ACK information bits are arranged in an order of the indexes of the activated BWPs where PDSCHs are located;

[0234] (2) the corresponding HARQ-ACK information bits are arranged in an order of the indexes of the carriers where PDSCHs are located;

[0235] (3) the corresponding HARQ-ACK information bits are arranged in an order of the frequencies of the activated BWPs where PDSCHs are located; and

[0236] (4) the corresponding HARQ-ACK information bits are arranged in a sequential order of starting symbols of PDSCHs.

[0237]

[0238] Figure 5 is a flowchart of another method executed by a UE according to an embodiment of the present application;

[0239] In an embodiment of the present application, a method executed by a UE in a communication system is provided. As shown in Figure 5, this method includes the following steps.

[0240] In step S501, receiving a third signaling, the third signaling including information related to switching an activated bandwidth part (BWP) from one BWP on one carrier to another BWP on another carrier, the carrier before switching and the carrier after switching being configured in a same serving cell.

[0241] In step S502, performing cross-carrier BWP switching, and performing uplink transmission or downlink reception on the activated BWP after switching.

[0242] Optionally, the third signaling is indicated through at least one of a UE-specific RRC signaling, an MAC CE and DCI.

[0243] Optionally, the BWP before switching and the BWP after switching are located in different bands, respectively.

[0244] That is, in the embodiment of the present application, the UE activates only one BWP for transmission, and the UE may perform cross-carrier BWP switching in a serving cell based on the indication of the base station.

[0245] In the embodiment of the present application, the UE obtains the diversity gain by dynamically switching transmission across carriers. Compared with aggregating activated BWPs in a plurality of serving cells for transmission, it is more flexible, the system can be better simplified, and the signaling overhead can be saved. The specific advantage analysis can refer to the above description and will not be repeated here.

[0246] In the embodiment of the present application, the UE may also report at least one of the following capabilities to the base station:

[0247] (1) a capability of supporting BWP switching, the BWP before switching and the BWP after switching being located on different carriers, i.e., a capability of supporting cross-carrier BWP switching;

[0248] (2) a capability of supporting BWP switching, wherein, the BWP before switching and the BWP after switching being located in different bands, i.e., a capability of supporting cross-band BWP switching;

[0249] (3) a capability of supporting transmission on at least two activated BWPs, the at least two BWPs being located on different carriers, i.e., a capability of supporting simultaneous activation of BWPs on a plurality of carriers, a plurality of BWPs on different carriers in a serving cell may be activated simultaneously, and the plurality of activated BWPs may be simultaneously used for transmission; and

[0250] (4) a capability of supporting transmission on at least two activated BWPs, wherein the at least two BWPs being located in different bands, i.e., a capability of supporting simultaneous activation of BWPs in different bands, a plurality of BWPs in different bands may be activated simultaneously, and the plurality of activated BWPs may be simultaneously used for transmission.

[0251] In the embodiment of the present application, the cross-carrier BWP switching needs to satisfy a preset condition. Optionally, switching an activated BWP from one BWP on one carrier to another BWP on another carrier includes at least one of the following conditions:

[0252] (1) A frequency domain interval between the carrier before switching and the carrier after switching does not exceed a first preset bandwidth, wherein the frequency domain interval between the carrier before switching and the carrier after switching may refer to the interval between the lowest frequency positions of two carriers.

[0253] (2) Both the carrier before switching and the carrier after switching are included in a second preset bandwidth, that is, the interval between the lowest frequency position of a lower frequency carrier and the highest frequency position of a higher frequency carrier in two carriers does not exceed the second preset bandwidth.

[0254] (3) A frequency domain interval between the BWP before switching and the BWP after switching does not exceed a third preset bandwidth, wherein the frequency domain interval between the BWP before switching and the BWP after switching may refer to the interval between the lowest frequency positions of two BWPs.

[0255] (4) Both the BWP before switching and the BWP after switching are included in a fourth preset bandwidth, that is, the interval between the lowest frequency position of the lower frequency BWP and the highest frequency position of the higher frequency BWP in two BWPs does not exceed the fourth preset bandwidth.

[0256] The above preset bandwidth may be related to the band range. Optionally, for each preset bandwidth in the first preset bandwidth, the second preset bandwidth, the third preset bandwidth and / or the fourth preset bandwidth, the size of each preset bandwidth is different in FR1 and FR2 scenarios. For example, for the FR1 band, the above preset bandwidth may use the first preset bandwidth (e.g., 100 MHz); while for the FR2 band, the preset bandwidth may use the second preset bandwidth (e.g., 400 MHz). And / or, the size of each preset bandwidth is different for UEs with different capabilities. In addition, the first preset bandwidth, the second preset bandwidth, the third preset bandwidth and / or the fourth preset bandwidth may be the same or different, and the sizes of these preset bandwidths are predefined.

[0257] In the embodiment of the present application, a certain processing delay is required for the UE to perform cross-carrier BWP switching.

[0258] Optionally, in a situation where the subcarrier interval between two switched BWPs remains unchanged, the performing cross-carrier BWP switching may specifically include: performing BWP switching within a first preset duration, wherein, the first preset duration corresponds to a switching delay of switching an activated BWP from one BWP on one carrier to another BWP on another carrier (i.e., cross-carrier BWP switching), wherein the length of the first preset duration is different from that of a second preset duration, and the second preset duration corresponds to a switching delay of switching an activated BWP from one BWP on one carrier to another BWP on the same carrier (i.e., intra-carrier BWP switching). That is, the size of the processing delay for cross-carrier BWP switching is different from that of the processing delay for intra-carrier BWP switching. Optionally, the former is larger.

[0259] Optionally, depending on whether two switched carriers belong to a same band, the cross-carrier BWP switching may also be classified into cross-band cross-carrier BWP switching and intra-band cross-carrier BWP switching; and, in a situation where the subcarrier interval between two switched BWPs remains unchanged, the performing cross-carrier BWP switching may specifically include at least one of the following situations:

[0260] if the BWP before switching and the BWP after switching are located in different bands, respectively, performing cross-carrier BWP switching within a third preset duration, wherein, the third preset duration corresponds to a switching delay of switching an activated BWP from one BWP on one carrier in one band to another BWP on another carrier in another band (i.e., cross-band cross-carrier BWP switching); and

[0261] if the BWP before switching and the BWP after switching are located in a same band, performing BWP switching within a fourth preset duration, wherein, the fourth preset duration corresponds to a switching delay of switching an activated BWP from one BWP on one carrier in one band to another BWP on another carrier in the same band.

[0262] Wherein, the length of the third preset duration is different from that of the fourth preset duration.

[0263] Optionally, the length of the third preset duration is greater than that of the fourth preset duration. That is, the size of the processing delay for cross-band cross-carrier switching is also different from that of the processing delay for intra-band cross-carrier switching. Optionally, the former is larger.

[0264] Optionally, for each preset duration in the first preset duration, the third preset duration and the fourth duration, the length of each preset duration is different for UEs with different capabilities. That is, different UE capabilities may correspond to BWP switching delays with different sizes.

[0265] In practical applications, in a situation where the subcarrier interval between two switched BWPs remains unchanged, the delay for intra-carrier BWP switching may correspond to a first preset value, the delay for intra-band cross-carrier BWP switching corresponds to a second preset value, and the delay for cross-band cross-carrier BWP switching corresponds to a third preset value. Different UE capabilities correspond to cross-carrier BWP switching delays with different sizes, that is, cross-carrier BWP switching delays with multiple sizes may be specified.

[0266] In the embodiment of the present application, the cross-carrier BWP switching may be controlled by a timer. Optionally, when the timer bwp-inactivitytimer expires and if the current activated BWP is not located on a preset carrier, the UE may perform BWP switching. If the UE receives data scheduling or an MAC PDU, the UE restarts the timer bwp-inactivitytimer. In other words, within a fifth preset duration (i.e., a duration with a size of bwp-inactivitytimer), if the UE has not monitored the data scheduling or has not received the MAC PDU, that is, if the bwp-inactivitytimer expires, the UE performs BWP switching.

[0267] Specifically, if a timer (i.e., bwp-InactivityTimer) associated with an activated BWP expires, the UE may perform at least one of the following BWP switching:

[0268] (1) if the carrier where the activated BWP is not a preset carrier, switching the activated BWP to a first preset BWP on the preset carrier; and, if the first preset BWP is not configured, switching the activated BWP to an initial BWP on the preset carrier;

[0269] (2) if the activated BWP is not a second preset BWP on the carrier where the activated BWP is located, switching the activated BWP to the second preset BWP on the carrier where the activated BWP is located; and, if the second preset BWP is not configured, switching the activated BWP to an initial BWP on the carrier where the activated BWP is located, or switching the activated BWP to a first preset BWP on the preset carrier; and

[0270] (3) if the activated BWP is not a third preset BWP on a carrier group where the activated BWP is located, switching the activated BWP to the third BWP on the carrier group where the activated BWP is located; and, if the third preset BWP is not configured, switching the activated BWP to a first preset BWP on the preset carrier.

[0271] Wherein the first preset BWP is configured through a UE-specific RRC signaling; and / or, the second preset BWP is configured through a UE-specific RRC signaling, and the second preset BWP is configured separately for each carrier; and / or, the third preset BWP is configured through a UE-specific RRC signaling, and the third preset BWP is configured separately for each carrier group.

[0272] As an example, when the timer bwp-inactivitytimer expires and if the current activated BWP is not a default carrier (i.e., preset carrier), the UE should switch the activated BWP from a non-default carrier to a default BWP on a default carrier (in a situation where the default BWP has been configured through a UE-specific RRC signaling); and, if the default BWP is not configured, the UE should switch the activated BWP from a non-default carrier to an initial BWP on a default carrier, and the initial BWP is the first activated BWP on the default carrier.

[0273] As another example, the UE is configured with a plurality of downlink carriers, and at least one downlink BWP may be configured on each downlink carrier. Among the plurality of downlink BWPs, one downlink BWP may be configured as the default downlink BWP on this carrier for BWP fallback of this carrier. For example, if the bwp-inactivitytimer associated with an activated BWP expires and the current activated BWP is not the default downlink BWP on the carrier where the activated BWP is located, the UE switches the activated BWP to the default downlink BWP on the carrier where this downlink BWP is located; if no corresponding default downlink BWP is configured on the carrier where the downlink BWP is located, the UE switches the activated BWP to a default downlink BWP on a default carrier (e.g., anchor carrier); and, if no default downlink BWP is configured on the default carrier (e.g., anchor carrier), the UE switches the activated BWP to an initial downlink BWP on the default carrier (e.g., anchor carrier).

[0274] In the embodiment of the present application, the UE may perform BWP switching in the following way: if a timer associated with an activated BWP expires and the activated BWP is not a second preset BWP on the carrier where the activated BWP is located, switching the activated BWP to the second preset BWP on the carrier where the activated BWP is located; and / or, if a timer associated with an activated BWP expires, the activated BWP is a second preset BWP on the carrier where the activated BWP is located and the carrier where the activated BWP is located is not a preset carrier, switching the activated BWP to a first preset BWP on the preset carrier. Optionally, the BWP switching process may correspond to at least two timers. If the first timer bwp-InactivityTimer-1 associated with the activated BWP expires and the activated BWP is not the default BWP (second preset BWP) on the carrier where the activated BWP is located, the activated BWP is switched to the default BWP (second preset BWP) on the carrier where the activated BWP is located; and, if the second timer bwp-InactivityTimer-2 associated with the BWP expires, the activated BWP is the second preset BWP on the carrier where the activated BWP is located, the activated BWP is the default BWP on the carrier where the activated BWP is located and the carrier where the activated BWP is located is not the preset carrier, the activated BWP is switched to the first preset BWP on the preset carrier, wherein the first timer and the second timer is the same timer, or the first timer and the second timer are different timers. That is, the sizes of the two timers are configured separately, and may be different.

[0275] In the embodiment of the present application, if the carrier after switching is configured with a plurality of BWPs, the UE may switch the activated BWP to a fourth preset BWP in the plurality of BWPs. Wherein the fourth preset BWP may also be a default BWP, and is preconfigured through a UE-specific RRC signaling. That is, for cross-carrier BWP switching, when it is switched from one carrier to another carrier, it needs to be firstly switched to a default BWP on the another carrier. For example, if the base station instructs the UE to switch from one carrier to another carrier, the UE switches to a fourth preset BWP on this carrier.

[0276] In the above embodiments, the preset carrier (i.e., default carrier) includes at least one of the following: an anchor carrier, a carrier with a smallest index, and a carrier preconfigured through high layer signaling; and, the first preset BWP, the second preset BWP, the third preset BWP and / or the fourth preset BWP (which all may be interpreted as default BWPs) includes at least one of the following: an initial BWP, a BWP with a smallest index, and a BWP preconfigured through high layer signaling.

[0277] In the method executed by a UE provided in the embodiment of the present application, the UE can use at least two activated BWPs in a serving cell for transmission, or obtain the diversity gain by dynamically switching transmission across carriers. Compared with aggregating activated BWPs in a plurality of serving cells for transmission, the system can be better simplified, and the signaling overhead can be saved.

[0278]

[0279] Figure 6 is a flowchart of a method executed by a base station according to an embodiment of the present application.

[0280] In an embodiment of the present application, a method executed by a base station in a communication system is further provided. As shown in Figure 6, the method includes the following steps.

[0281] In step S601, transmitting a first signaling, wherein the first signaling including information related to at least two activated bandwidth parts (BWPs), wherein the at least two activated BWPs being located on different carriers, respectively, and the carriers where the at least two activated BWPs are located being configured in a same serving cell.

[0282] In step S602, performing uplink reception or downlink transmission on the at least two activated BWPs.

[0283] Wherein, the first signaling is indicated through at least one of a UE-specific RRC signaling, an MAC CE and DCI.

[0284] Optionally, each activated BWP of the at least two activated BWPs are located in different bands, respectively.

[0285] Optionally, the performing uplink transmission or downlink reception on the at least two activated BWPs includes: if at least one activated BWP in the at least two activated BWPs indicated by the first signaling and a previous activated BWP are different and not located on a same carrier, the first signaling indicating the UE to perform cross-carrier BWP switching, and performing, by the base station, uplink reception or downlink transmission on the latest activated BWP.

[0286] Optionally, the performing cross-carrier BWP switching includes at least one of the following conditions:

[0287] a frequency domain interval between the carrier before BWP switching and the carrier after BWP switching does not exceed a first preset bandwidth;

[0288] both the carrier before BWP switching and the carrier after BWP switching are included in a second preset bandwidth;

[0289] a frequency domain interval between the BWP before switching and the BWP after switching does not exceed a third preset bandwidth; and

[0290] both the BWP before switching and the BWP after switching are included in a fourth preset bandwidth.

[0291] Optionally, for each preset bandwidth in the first preset bandwidth, the second preset bandwidth, the third preset bandwidth and / or the fourth preset bandwidth, the size of each preset bandwidth is different in FR1 and FR2 scenarios, and / or the size of each preset bandwidth is different for UEs with different capabilities.

[0292] Optionally, the performing cross-carrier BWP switching includes:

[0293] performing BWP switching within a first preset duration, wherein, the first preset duration corresponds to a switching delay of switching an activated BWP from one BWP on one carrier to another BWP on another carrier;

[0294] wherein the length of the first preset duration is different from that of a second preset duration, and the second preset duration corresponds to a switching delay of switching an activated BWP from one BWP on one carrier to another BWP on the same carrier.

[0295] Optionally, the performing cross-carrier BWP switching includes at least one of the following:

[0296] if the BWP before switching and the BWP after switching are located in different bands, respectively, performing the cross-carrier BWP switching within a third preset duration, wherein, the third preset duration corresponds to a switching delay of switching an activated BWP from one BWP on one carrier in one band to another BWP on another carrier in another band; and

[0297] if the BWP before switching and the BWP after switching are located in a same band, performing the cross-carrier BWP switching within a fourth preset duration, wherein, the fourth preset duration corresponds to a switching delay of switching an activated BWP from one BWP on one carrier in one band to another BWP on another carrier in the same band.

[0298] Optionally, the length of the third preset duration is different from that of the fourth preset duration.

[0299] Optionally, the length of the third preset duration is greater than that of the fourth preset duration.

[0300] Optionally, for each preset duration in the first preset duration, the third preset duration and the fourth duration, the length of each preset duration is different for UEs with different capabilities.

[0301] Optionally, the preset carrier includes at least one of the following:

[0302] an anchor carrier;

[0303] a carrier with a smallest index; and

[0304] a carrier preconfigured through high layer signaling; and

[0305] the first preset BWP, the second preset BWP, the third preset BWP and / or the fourth preset BWP includes at least one of the following:

[0306] an initial BWP;

[0307] a BWP with a smallest index; and

[0308] a BWP preconfigured through high layer signaling.

[0309] Optionally, the at least two activated BWPs include one first activated BWP and at least one second activated BWP, and the at least two activated BWPs include at least one of the following situations:

[0310] the first activated BWP is located on an anchor carrier;

[0311] a PDSCH or PUSCH transmitted on the second activated BWP uses a related channel transmission configuration on the first activated BWP;

[0312] a PDCCH and / or PUCCH is only transmitted on one BWP in the at least two activated BWPs, wherein the BWP that transmits the PDCCH and / or PUCCH is fixed as the first activated BWP or preconfigured as one of the at least two activated BWPs;

[0313] a band interval between the first activated BWP and the second activated BWP does not exceed a fifth preset bandwidth; and

[0314] both the first activated BWP and the second activated BWP are included in a sixth preset bandwidth.

[0315] Optionally, the first signaling includes first DCI, and the first DCI includes the index of the first activated BWP and / or the index of the second activated BWP;

[0316] wherein whether the first DCI includes the index of the second activated BWP and / or the number of the second activated BWP are preconfigured through high layer signaling.

[0317] Optionally, all BWPs on all carriers in the serving cell where the UE is located are uniformly numbered.

[0318] Optionally, the first DCI further includes the index of the carrier where the first activated BWP is located and / or the index of the carrier where the second activated BWP is located.

[0319] Optionally, there is a correspondence between first BWPs and second BWPs; the second BWP corresponding to the first BWP is preconfigured through high layer signaling; and, if the first signaling indicates that the first BWP is activated as the first activated BWP, the second BWP corresponding to the first BWP is also activated as the second activated BWP by default.

[0320] Optionally, if the first signaling is used for indicating that a BWP group is activated, all BWPs in the BWP group are activated;

[0321] wherein the BWP group is preconfigured through high layer signaling.

[0322] Optionally, the first signaling includes second DCI, the second DCI includes a fifth indication domain, and the fifth indication domain is used for indicating the activated BWP group.

[0323] Optionally, the second DCI includes the index of the activated BWP group and the indexes of the activated BWPs, and the index of the activated BWP group and the indexes of the activated BWPs are indicated by different state values of a same indication domain.

[0324] Optionally, the method further includes:

[0325] transmitting a second signaling, the second signaling including information of whether the at least one second activated BWP is in a dormant state;

[0326] wherein the second signaling is indicated through at least one of MAC CE and DCI.

[0327] Optionally, the second signaling includes third DCI, and the third DCI includes at least one of the following information:

[0328] whether each second activated BWP is in the dormant state;

[0329] the length of the duration of the dormant state of each second activated BWP; and

[0330] whether each second activated BWP is in the dormant state and / or the length of the duration of the dormant state, which are indicated for a plurality of UEs separately.

[0331] Optionally, the third DCI includes an indication domain; a state value of the indication domain indicates that the second activated BWP does not enter the dormant state, and other state values of the indication domain indicate that the second activated BWP enters the dormant state and lasts for a preset time lengths corresponding to the state value; different state values correspond to different time lengths; and, the preset time length is configured through a UE-specific RRC signaling.

[0332] Optionally, the third DCI is transmitted on the first activated BWP.

[0333] Optionally, for each second activated BWP, the method further includes:

[0334] if the timer associated with the second activated BWP expires, switching the second activated BWP to the dormant state.

[0335] Optionally, if the second activated BWP is in the dormant state, the behavior executed by the UE includes at least one of the following:

[0336] stopping the timer associated with the second activated BWP;

[0337] not monitoring a PDCCH on the second activated BWP;

[0338] not monitoring a PDCCH for scheduling the second activated BWP;

[0339] not reporting CSI on the second activated BWP;

[0340] not transmitting a UL-SCH on the second activated BWP;

[0341] not transmitting an RACH on the second activated BWP;

[0342] not transmitting a PUCCH on the second activated BWP;

[0343] clearing a preconfigured downlink grant and a configured type 2 uplink grant on the second activated BWP; and

[0344] suspending a preconfigured type 1 uplink grant on the second activated BWP.

[0345] Optionally, the method further includes: receiving, on other activated BWPs that are not in the dormant state, the CSI on the second activated BWP in the dormant state.

[0346] Optionally, the method further includes: if BWP switching is performed for any second activated BWP in the dormant state, the second activated BWP after switching continuously remains in the dormant state, or the second activated BWP after switching exits the dormant state.

[0347] Optionally, the method further includes:

[0348] transmitting, on one BWP in the at least two activated BWPs, a PDCCH for scheduling all the activated BWPs;

[0349] wherein the BWP that transmits the PDCCH is fixed as the first activated BWP or preconfigured as one of the at least two activated BWPs.

[0350] Optionally, the transmitted PDCCH includes information related to the scheduled activated BWP and / or the carrier where the scheduled activated BWP is located.

[0351] Optionally, the DCI carried by the PDCCH includes scheduling information related to a plurality of PDSCHs or a plurality of PUSCHs, and the method further includes:

[0352] transmitting a plurality of PDSCHs or a plurality of PUSCHs on respective allocated resources on a plurality of scheduled activated BWPs, respectively;

[0353] and / or, the DCI carried by the PDCCH includes scheduling information related to one PDSCH or one PUSCH, and the method further includes:

[0354] transmitting one PDSCH or one PUSCH on total allocated resources of a plurality of scheduled activated BWPs.

[0355] Optionally, the first activated BWP includes at least one of the following:

[0356] an activated BWP on an anchor carrier;

[0357] an activated BWP on a carrier with a smallest index;

[0358] an activated BWP on a carrier with an index of 0;

[0359] an activated BWP with a lowest frequency;

[0360] an activated BWP on a preconfigured carrier; and

[0361] an activated BWP configured with PDCCH and / or PUCCH transmission.

[0362] Optionally, the method further includes:

[0363] receiving, on one BWP in the at least two activated BWPs, HARQ-ACK feedbacks corresponding to PDSCHs on all activated BWPs;

[0364] wherein the BWP that transmits the HARQ-ACK feedbacks is fixed as the first activated BWP or preconfigured as one of the at least two activated BWPs.

[0365] Optionally, the HARQ-ACK information corresponding to PDSCHs on all activated BWPs is included in a same codebook for feedback, wherein the order of the HARQ-ACK information in the codebook is determined in at least one of the following ways:

[0366] the corresponding HARQ-ACK information bits are arranged in an order of the indexes of the activated BWPs where PDSCHs are located;

[0367] the corresponding HARQ-ACK information bits are arranged in an order of the indexes of the carriers where PDSCHs are located;

[0368] the corresponding HARQ-ACK information bits are arranged in an order of the frequencies of the activated BWPs where PDSCHs are located; and

[0369] the corresponding HARQ-ACK information bits are arranged in a sequential order of starting symbols of PDSCHs.

[0370] Optionally, the method further includes:

[0371] receiving at least one of the following capabilities reported by the UE:

[0372] a capability of supporting BWP switching, wherein the BWP before switching and the BWP after switching being located on different carriers;

[0373] a capability of supporting BWP switching, wherein the BWP before switching and the BWP after switching being located in different bands;

[0374] a capability of supporting transmission on at least two activated BWPs, wherein the at least two BWPs being located on different carriers; and

[0375] a capability of supporting transmission on at least two activated BWPs, the at least two BWPs being located in different bands.

[0376]

[0377] Figure 7 is a flowchart of another method executed by a base station according to an embodiment of the present application.

[0378] In an embodiment of the present application, another method executed by a base station in a communication system is further provided. As shown in Figure 7, the method includes the following steps.

[0379] In step S701, transmitting a third signaling, the third signaling including information related to switching an activated bandwidth part (BWP) from one BWP on one carrier to another BWP on another carrier, wherein the carrier before BWP switching and the carrier after BWP switching being configured in a same serving cell.

[0380] In step S702, performing uplink reception or downlink transmission on the latest activated BWP.

[0381] Optionally, the third signaling is indicated through at least one of a UE-specific RRC signaling, an MAC CE and DCI.

[0382] Optionally, the BWP before switching and the BWP after switching are located in different bands, respectively.

[0383] Optionally, switching an activated BWP from one BWP on one carrier to another BWP on another carrier includes at least one of the following conditions:

[0384] a frequency domain interval between the carrier before BWP switching and the carrier after BWP switching does not exceed a first preset bandwidth;

[0385] both the carrier before BWP switching and the carrier after BWP switching are included in a second preset bandwidth;

[0386] a frequency domain interval between the BWP before switching and the BWP after switching does not exceed a third preset bandwidth; and

[0387] both the BWP before switching and the BWP after switching are included in a fourth preset bandwidth.

[0388] Optionally, for each preset bandwidth in the first preset bandwidth, the second preset bandwidth, the third preset bandwidth and / or the fourth preset bandwidth, the size of each preset bandwidth is different in FR1 and FR2 scenarios, and / or the size of each preset bandwidth is different for UEs with different capabilities.

[0389] In the method executed by a base station provided in the embodiment of the present application, the UE can use at least two activated BWPs in a serving cell for transmission, or obtain the diversity gain by dynamically switching transmission across carriers. Compared with aggregating activated BWPs in a plurality of serving cells for transmission, it is more flexible, the system can be better simplified, and the signaling overhead can be saved.

[0390] An embodiment of the present application provides an electronic device, including: a transceiver, which is configured to transmit and receive signals; and, a processor, which is coupled to the transceiver and configured to implement the steps in the above method embodiments. Optionally, if the electronic device may be a UE, the processor is configured to implement the steps in the embodiments of the method executed by a UE. The detailed functional description and the achieved beneficial effects can refer to the above description of the embodiments of the method executed by a UE and will not be repeated here. Optionally, if the electronic device may be a base station, the processor is configured to implement the steps in the embodiments of the method executed by a base station. The detailed functional description and the achieved beneficial effects can specifically refer to the above description of the embodiments of the method executed by a base station and will not be repeated here. In practical applications, the UE or the base station can be construed as different network nodes.

[0391] An embodiment of the present application further provides an electronic device, including a processor, and may optionally include a transceiver and / or memory coupled to the processor. The processor is configured to execute the steps of the method provided in any one of the optional embodiments of the present application.

[0392]

[0393] Figure 8 shows a schematic structure diagram of an electronic device to which an embodiment of the present invention is applied.

[0394] As shown in Figure 8, the electronic device 4000 in Figure 8 includes a processor 4001 and a memory 4003. The processor 4001 is connected to the memory 4003, for example, via a bus 4002. Optionally, the electronic device 4000 may further include a transceiver 4004. The transceiver 4004 may be configured for data interaction between this electronic device and other electronic devices, for example, transmitting data and / or receiving data. It is to be noted that, in practical applications, the number of the transceiver 4004 is not limited to 1, and the structure of the electronic device 4000 does not constitute any limitations to the embodiment of the present application. Optionally, the electronic device may be a first network node, a second network node or a third network node.

[0395] The processor 4001 may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The processor can implement or execute various exemplary logic blocks, modules and circuits described in the disclosure of the present application. The processor 4001 may also be a combination for realizing computing functions, for example, a combination of one or more microprocessors, a combination of DSPs and microprocessors, etc.

[0396] The bus 4002 may include a passageway for transferring information between the above components. The bus 4002 may be a peripheral component interconnect (PCI) bus, an extended industry standard architecture (EISA) bus, etc. The bus 4002 may be classified into address bus, data bus, control bus, etc. For ease of representation, the bus is represented by only one bold line in Figure 8, but it does not mean that there is only one bus or one type of buses.

[0397] The memory 4003 may be, but not limited to, read only memories (ROMs) or other types of static storage devices capable of storing static information and instructions, random access memories (RAMs) or other types of dynamic storage devices capable of storing information and instructions, or electrically erasable programmable read only memories (EEPROMs), compact disc read only memories (CD-ROMs) or other optical disc storages, optical disc storages (including compact discs, laser discs, optical discs, digital versatile optical discs, Blue-ray discs, etc.), magnetic disc storage mediums or other magnetic storage devices, or any other medium that can be used to carry or store computer programs and can be accessed by a computer.

[0398] The memory 4003 is configured to store computer programs for executing the embodiments of the present application, and is controlled and executed by the processor 4001. The processor 4001 is configured to execute the computer programs stored in the memory 4003 to implement the steps in the above method embodiments.

[0399] An embodiment of the present application provides a computer-readable storage medium having computer programs stored thereon that, when executed by a processor, can implement the steps and corresponding contents in the above method embodiments.

[0400] An embodiment of the present application further provides a computer program product, including computer programs that, when executed by a processor, can implement the steps and corresponding contents in the above method embodiments.

[0401] The terms "first", "second", "third", "fourth", "1", "2" and the like (if any) in the specification and claims of the present application and the drawings are used for distinguishing similar objects, rather than describing a particular order or precedence. It should be understood that data, as used in such a way, may be used interchangeably if appropriate, so that the embodiments of the present application described herein may be implemented in an order other than those illustrated or described here.

[0402] It should be understood that although the steps in the flowchart of the embodiments of the present application are sequentially displayed by following the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless explicitly stated herein, in some implementation scenarios of the embodiments of the present application, the steps in the flowcharts may be executed in other sequences as required. In addition, based on actual implementation scenarios, some or all of the steps in the flowcharts can include multiple sub-steps or multiple stages. Some or all of the sub-steps or stages can be executed at the same moment, and each of the sub-steps or stages can be executed at a different moment. In scenarios with different execution times, the execution order of these sub-steps or stages may be flexibly configured according to requirements, which is not limited in the embodiments of the present application.

[0403] The text and the drawings are merely provided as examples to help readers to understand the present application. They should not be construed as limiting the scope of the present application in any way. Although some embodiments and examples have been provided, based on the contents disclosed herein, it is obvious for those skilled in the art that the illustrated embodiments and examples can be altered without departing from the scope of the present application, and other similar implementation means based on the technical idea of the present application shall also fall into the protection scope of the embodiments of the present application.

Claims

1.A method performed by a terminal in a wireless communication system, the method comprising:receiving, from a base station, configuration information on a plurality of carriers for a serving cell of the base station, the configuration information including information on at least one bandwidth part (BWP) configured for a carrier among the plurality of the carriers;receiving, from the base station, control information indicating a BWP activation of at least two BWPs, wherein the at least two BWPs are activated on different carriers of the serving cell based on the control information; andperforming an uplink transmission or a downlink reception with the base station on the at least two BWPs.2.The method of claim 1, further comprising:receiving, from the base station, information indicating a BWP switching from one BWP among the at least two BWPs to another BWP; andswitching the one BWP to the another BWP based on the information,wherein a carrier for the one BWP is different from a carrier for the another BWP.3.The method of claim 1, further comprising:starting a timer for one BWP of the at least two BWPs, the timer being used for a BWP inactivation; andin case that the timer expires, switching from the one BWP to a default BWP configured for a default carrier,wherein at least one of a system information reception or an initial random access procedure is performed on the default carrier.4.The method of claim 1, further comprising:starting a timer for one BWP of the at least two BWPs, the timer being used for controlling whether the one BWP of the at least two BWPs enters a dormant state; andin case that the timer expires, switching a state of the one BWP to the dormant state;wherein a carrier for the one BWP is not a default carrier for which a default BWP is configured.5.A method performed by a base station in a wireless communication system, the method comprising:transmitting, to a terminal, configuration information on a plurality of carriers for a serving cell of the base station, the configuration information including information on at least one bandwidth part (BWP) configured for a carrier among the plurality of the carriers;transmitting, to the terminal, control information indicating a BWP activation of at least two BWPs, wherein the at least two BWPs are activated on different carriers of the serving cell based on the control information; andperforming an uplink reception or a downlink transmission with the terminal on the at least two BWPs.6.The method of claim 5, further comprising:transmitting, to the terminal, information indicating a BWP switching from one BWP among the at least two BWPs to another BWP,wherein the one BWP is switched to the another BWP based on the information, andwherein a carrier for the one BWP is different from a carrier for the another BWP.7.The method of claim 5,wherein one BWP of the at least two BWPs is switched to a default BWP configured for a default carrier, in case that a timer for the one BWP expires,wherein the timer is used for a BWP inactivation, andwherein at least one of a system information transmission and an initial random access procedure is performed on the default carrier.8.The method of claim 5,wherein a state of one BWP of the at least two BWPs is switched to a dormant state, in case that a timer for the one BWP expires,wherein the timer is used for controlling whether the one BWP enters the dormant state, andwherein a carrier for the one BWP is not a default carrier for which a default BWP is configured.9.A terminal in a wireless communication system, the terminal comprising:a transceiver; anda processor coupled with the transceiver and configured to:receive, from a base station, configuration information on a plurality of carriers for a serving cell of the base station, the configuration information including information on at least one bandwidth part (BWP) configured for a carrier among the plurality of the carriers,receive, from the base station, control information indicating a BWP activation of at least two BWPs, wherein the at least two BWPs are activated on different carriers of the serving cell based on the control information, andperform an uplink transmission or a downlink reception with the base station on the at least two BWPs.10.The terminal of claim 9, wherein the processor is further configured to:receive, from the base station, information indicating a BWP switching from one BWP among the at least two BWPs to another BWP, andswitch the one BWP to the another BWP based on the information,wherein a carrier for the one BWP is different from a carrier for the another BWP.11.The terminal of claim 9, wherein the processor is further configured to:start a timer for one BWP of the at least two BWPs, the timer being used for BWP inactivation, andin case that the timer expires, switch from the one BWP to a default BWP configured for a default carrier,wherein at least one of a system information reception or an initial random access procedure is performed on the default carrier.12.The terminal of claim 9, wherein the processor is further configured to:start a timer for one BWP of the at least two BWPs, the timer being used for controlling whether the one BWP enters a dormant state, andin case that the timer expires, switch a state of the one BWP to the dormant state,wherein a carrier for the one BWP is not a default carrier for which a default BWP is configured.13.A base station in a wireless communication system, the base station comprising:a transceiver; anda processor coupled with the transceiver and configured to:transmit, to a terminal, configuration information on a plurality of carriers for a serving cell of the base station, the configuration information including information on at least one bandwidth part (BWP) configured for a carrier among the plurality of the carriers,transmit, to the terminal, control information indicating a BWP activation of at least two BWPs, wherein the at least two BWPs are activated on different carriers of the serving cell based on the control information, andperform an uplink reception or a downlink transmission with the terminal on the at least two BWPs.14.The base station of claim 13,wherein the processor is further configured to transmit, to the terminal, information indicating a BWP switching from one BWP among the at least two BWPs to another BWP,wherein the one BWP is switched to the another BWP based on the information, andwherein a carrier for the one BWP is different from a carrier for the another BWP.15.The base station of claim 13,wherein a first BWP of the at least two BWPs is switched to a default BWP configured for a default carrier, in case that a first timer for the first BWP expires,wherein the first timer is used for a BWP inactivation,wherein at least one of a system information transmission and an initial random access procedure is performed on the default carrier,wherein a state of second BWP of the at least two BWPs is switched to a dormant state, in case that a second timer for the second BWP expires,wherein the second timer is used for controlling whether the second BWP enters the dormant state, andwherein a carrier for the second BWP is not a default carrier for which a default BWP is configured.

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